Lakes & Ponds

How does REGEN-Blue® pond dye control algae?

What is daylight?

Daylight (or white light) is made up of a series of colours, collectively referred to as a spectrum.

This is known because when a beam of white light is passed through a glass prism; the white light splits into seven visible colours with red shades at one end through to blues and violets at the other.

Filters block colours

When a white light source has a coloured filter placed over the beam the observer will then see the light as a colour, i.e. a green filter shows as green – blue as blue, etc.

It is useful to realize that when white light hits the filter, the other colours are being blocked. The filter is allowing only certain colours of the spectrum through.

Dye blocks the red end of the spectrum

By adding REGEN-Blue® to water, a filter is being created to block colours from the red end of the spectrum getting through to the bottom of your pond or lake.

How does this help?

Photosynthesis needs red light

All plants, surface or submerged use the process of photosynthesis to thrive and grow and the whole process relies on red light to drive it.

By adding a filter to the pond or lake water you are blocking some, or all, of the red light and the process of photosynthesis is interrupted, with the result of little or no further growth.

Calculate the volume of water in the pond and see the product label for dose rates:
Width (metres) x Length (m) x Average Depth (m) x 1,000 = Litres

• Additional sachets can be added to darken the water further
• You cannot overdose.

Wear gloves when handling. Do not open sachets or touch the powder.

Maintenance Top Ups:

A general starting guide is 10-50% of the original dose each month.

Powdered Dye Sachets

By supplying dye powder in separate water-soluble sachets, it is easy to calculate the number required to dose a lake.

In large lakes, if a boat is being used, simply drop the sachets in different areas where they will dissolve, releasing the dye. By applying the dye into different areas, the time required to fully mix with the water is reduced.

If a boat is unavailable, face the water with a breeze coming from behind. Drop a few sachets along the edge and throw the others out into the water. The breeze will move the water and the dye will dissolve and disperse naturally.

Liquid Dye

If a boat is being used, gently pour the amount required into a wide area. The liquid dye rapidly disperses and will mix completely with all the water in the lake.

If a boat is not available pour the desired amount into the water along a bank with the wind behind you.

Regardless of which method is used, the water will look to have more colour in the first few days because it takes a little longer to completely mix and dilute from the top to the bottom.

Avoid ingestion, inhalation, skin and eye contact of the powder. Do not use in or near potable (drinking) water. Wash any contaminated clothing separately.

In its diluted form, Parklink’s Dye is SAFE for all aquatic creatures and for livestock to drink.

Frequently asked questions about pond dyes
The list of pond dye FAQs and answers is forever growing which is a big help for future customers. If your question is not below, please ask away. We are happy to assist and we will add your question and our answer to this list.

Will Parklink’s dyes work in all ponds and lakes?
Our pond dyes will create a light filter in all waters. The minimum doses do require at least 1 metre of overall depth, anything less requires more dye to compensate. For example, a pond half a metre deep will need a double dose.
Please note that not all weeds and algae are susceptible to treated water at minimum concentrations.

How long will the pond dye last?
There is no definitive answer to this question as strong sunlight and rainfall both have an effect on the dye. The Sun will fade the dye and rainfall will dilute it. We suggest that a monthly top-up of 10 to 15% of the original dose should be made in order to keep the dye concentration at its best.

I have fish in my pond, will they be safe?
The dosage recommended is very low and has no effect on fish. The European regulations have a fish test that uses the dyes in concentrations 1000 times greater than our suggested dose without any harmful effects.

My pet drinks from our pond, will it be ok?
We’ve encountered this question frequently regarding a variety of animals, including dogs, cats, and rabbits. Additionally, there are numerous unconventional “pets” beyond the common ones that our clients express worries about. In essence, water treated with Parklink’s dye will not alter its state from what it was prior to the dye application. Thus, if the pets were healthy before the dye was introduced, their well-being will persist. Please remember to stay vigilant about the presence of Blue Green Algae/cyanobacteria.

Our pond is visited by frogs/newts/Insects/invertebrates/dogs/cats/rabbits/insects – will the treated water be safe for them to drink?
The actual dye content in the water is very low and is not harmful.
Please note that a well-known brand of energy drink has 65 times more dye per litre than a litre of pond water dosed at the minimum rate!

Does dye help reduce weed growth as well as algae?
Yes. Rooted weeds at the bottom of the pond require sunlight to grow in exactly the same way as algae. Weeds that have leaves at, or above the surface of the water will be able to benefit from the sunlight, so it is recommended that pond dyes should be applied in early Spring before the weeds start to grow. Prevention is always better than a cure!

The weeds in our lake are growing, is it too late to use dye?
Some weeds require more light than others to photosynthesise. Those requiring a lot of light may not be able to support their own growth even when they have hit the surface. As stated above, try to apply the first dose in spring before growth is established.

What happens if we put too much pond dye in our water?
The water will be a deeper shade, and possibly opaque. Over time, rainfall will dilute the colour to the point where it will all be gone. It can also be diluted by adding more water. If emptying the pond is required, the water should be flushed into soil beds – please avoid letting over-dyed water get into surface drains or streams. Any water getting into a stream or drain will not be harmful, but anyone seeing coloured water flowing by may report what they think is pollution to the authorities for investigation.

Does the pond dye stain?
In concentrated form, dyes WILL stain hands and clothing, so it is always recommended that gloves are worn when handling the raw products. At recommended dilution rates no staining will occur.
REGEN-Reflect® uses a higher concentration of dye and may result in slight discolouration of surrounding stones and water features.
Spillages of the dye on surrounding areas should be washed with copious amounts of water first and strong sunlight should fade any residue.

Is it safe to swim in water treated with Parklink pond dyes?
Yes. All of Parklink’s dye products are made using European Food Approved Colours, but do give the concentrated dye time to mix into the water before diving in!

Can we use more than the recommended dose?
Yes,  REGEN-Blue® can be overdosed by many hundreds of times. It is sometimes necessary to add more than the minimum dosage, for example, if the weeds have grown and are getting near to the surface (normally 2, 3 or 4 times the minimum dose) but it depends on just how close to the surface the weeds are. There are a few lake owners that want to enhance the look of their lakes and use up to 10 times the minimum dose.

I have seen photographs where dye has been used and this made the water look very blue, why is that?
There can be many reasons such as the photographs taken too soon after application or the owners deliberately overdosing for effect. Even the reflection of a blue sky can make the water look bluer than it actually is. It is almost impossible to capture in a photo just how pale the water is once coloured.

How long does it take for the dye to mix into a pond?
This depends on a number of factors including the size of the pond and the “stillness” of the water. The more movement of water, the quicker the pond dye will mix. If re-circulating pumps are used the mixing will take less time. The simple movement of fish can also help to distribute the dye.

Will the Dye damage water pumps?
No. The dye is completely soluble and will pass through pumps and filters easily.

Can dyes be used with other pond treatments?
Yes, dyes can be used with other chemicals provided that they are not Chlorine-based. Chlorine will attack the dye by bleaching it and rendering it useless.

What do I do with unused dye?
Keep it in a cool, dry place with the lid firmly in place and use it for “topping up” or the following years(s). Stored in this way, Parklink’s dyes have a long shelf life.

• Controls the growth of unsightly algae and weed
• Hides fish from predators such as herons and cats
• Gives a rich depth quality to water
• Creates a beautiful contrast with plants & shrubs
• Cost effective and easy to apply 

Non-toxic, safe and easy to apply

Commercial pond dyes are non-toxic, high-quality, food colours providing a cost-effective method of controlling algae and weeds without affecting the health of fish, wildlife and plants.

Parklink’s commercial pond and lake dyes are supplied in two forms; powder sachets to treat large bodies of water and a liquid solution for smaller fisheries and large ponds.

REGEN-Blue® is the first of our commercial pond dyes for use in large lakes. REGEN-Blue® is the most popular and economical pond dye available. We later introduced REGEN-Reflect® for a twilight effect and now trialling a special dye, Special C, to combat Crassula Helmsii and Chara.

How does REGEN-Reflect® pond dye control algae?

What is daylight?

Daylight (or white light) is made up of a series of colours, collectively referred to as a spectrum.

This is known because when a beam of white light is passed through a glass prism; the white light splits into seven visible colours with red shades at one end through to blues and violets at the other.

Filters block colours

When a white light source has a coloured filter placed over the beam the observer will then see the light as a colour, i.e. a green filter shows as green – blue as blue, etc.

It is useful to realize that when white light hits the filter, the other colours are being blocked. The filter is allowing only certain colours of the spectrum through.

Dye blocks the red end of the spectrum

By adding REGEN-Reflect® to water, a filter is being created to block colours from the red end of the spectrum getting through to the bottom of your pond or lake.

How does this help?

Photosynthesis needs red light

All plants, surface or submerged use the process of photosynthesis to thrive and grow and the whole process relies on red light to drive it.

By adding a filter to the pond or lake water you are blocking some, or all, of the red light and the process of photosynthesis is interrupted, with the result of little or no further growth.

Calculate the volume of water in the pond and see the product label for dose rates:
Width (metres) x Length (m) x Depth (m) x 1,000 = Litres

• Additional sachets can be added to darken the water further
• You cannot overdose.

Wear gloves when handling. Do not open sachets or touch the powder.

Maintenance Top Ups:

A general starting guide is 10-50% of the original dose each month.

Powdered Dye Sachets

By supplying dye powder in separate water-soluble sachets, it is easy to calculate the number required to dose a lake.

In large lakes, if a boat is being used, simply drop the sachets in different areas where they will dissolve, releasing the dye. By applying the dye into different areas, the time required to fully mix with the water is reduced.

If a boat is unavailable, face the water with a breeze coming from behind. Drop a few sachets along the edge and throw the others out into the water. The breeze will move the water and the dye will dissolve and disperse naturally.

Liquid Dye

If a boat is being used, gently pour the amount required into a wide area. The liquid dye rapidly disperses and will mix completely with all the water in the lake.

If a boat is not available pour the desired amount into the water along a bank with the wind behind you.

Regardless of which method is used, the water will look to have more colour in the first few days because it takes a little longer to completely mix and dilute from the top to the bottom.

Avoid ingestion, inhalation, skin and eye contact of the powder. Do not use in or near potable (drinking) water. Wash any contaminated clothing separately.

In its diluted form, Parklink’s Dye is SAFE for all aquatic creatures and for livestock to drink.

Frequently asked questions about pond dyes
The list of pond dye FAQs and answers is forever growing which is a big help for future customers. If your question is not below, please ask away. We are happy to assist and we will add your question and our answer to this list.

Will Parklink’s dyes work in all ponds and lakes?
Our pond dyes will create a light filter in all waters. The minimum doses do require at least 1 metre of overall depth, anything less requires more dye to compensate. For example, a pond half a metre deep will need a double dose.
Please note that not all weeds and algae are susceptible to treated water at minimum concentrations.

How long will the pond dye last?
There is no definitive answer to this question as strong sunlight and rainfall both have an effect on the dye. The Sun will fade the dye and rainfall will dilute it. We suggest that a monthly top-up of 10 to 15% of the original dose should be made in order to keep the dye concentration at its best.

I have fish in my pond, will they be safe?
The dosage recommended is very low and has no effect on fish. The European regulations have a fish test that uses the dyes in concentrations 1000 times greater than our suggested dose without any harmful effects.

My pet drinks from our pond, will it be ok?
We’ve encountered this question frequently regarding a variety of animals, including dogs, cats, and rabbits. Additionally, there are numerous unconventional “pets” beyond the common ones that our clients express worries about. In essence, water treated with Parklink’s dye will not alter its state from what it was prior to the dye application. Thus, if the pets were healthy before the dye was introduced, their well-being will persist. Please remember to stay vigilant about the presence of Blue Green Algae/cyanobacteria.

Our pond is visited by frogs/newts/Insects/invertebrates/dogs/cats/rabbits/insects – will the treated water be safe for them to drink?
The actual dye content in the water is very low and is not harmful.
Please note that a well-known brand of energy drink has 65 times more dye per litre than a litre of pond water dosed at the minimum rate!

Does dye help reduce weed growth as well as algae?
Yes. Rooted weeds at the bottom of the pond require sunlight to grow in exactly the same way as algae. Weeds that have leaves at, or above the surface of the water will be able to benefit from the sunlight, so it is recommended that pond dyes should be applied in early Spring before the weeds start to grow. Prevention is always better than a cure!

The weeds in our lake are growing, is it too late to use dye?
Some weeds require more light than others to photosynthesise. Those requiring a lot of light may not be able to support their own growth even when they have hit the surface. As stated above, try to apply the first dose in spring before growth is established.

What happens if we put too much pond dye in our water?
The water will be a deeper shade, and possibly opaque. Over time, rainfall will dilute the colour to the point where it will all be gone. It can also be diluted by adding more water. If emptying the pond is required, the water should be flushed into soil beds – please avoid letting over-dyed water get into surface drains or streams. Any water getting into a stream or drain will not be harmful, but anyone seeing coloured water flowing by may report what they think is pollution to the authorities for investigation.

Does the pond dye stain?
In concentrated form, dyes WILL stain hands and clothing, so it is always recommended that gloves are worn when handling the raw products. At recommended dilution rates no staining will occur.
REGEN-Reflect® uses a higher concentration of dye and may result in slight discolouration of surrounding stones and water features.
Spillages of the dye on surrounding areas should be washed with copious amounts of water first and strong sunlight should fade any residue.

Is it safe to swim in water treated with Parklink pond dyes?
Yes. All of Parklink’s dye products are made using European Food Approved Colours, but do give the concentrated dye time to mix into the water before diving in!

Can we use more than the recommended dose?
Yes,  REGEN-Blue® can be overdosed by many hundreds of times. It is sometimes necessary to add more than the minimum dosage, for example, if the weeds have grown and are getting near to the surface (normally 2, 3 or 4 times the minimum dose) but it depends on just how close to the surface the weeds are. There are a few lake owners that want to enhance the look of their lakes and use up to 10 times the minimum dose.

I have seen photographs where dye has been used and this made the water look very blue, why is that?
There can be many reasons such as the photographs taken too soon after application or the owners deliberately overdosing for effect. Even the reflection of a blue sky can make the water look bluer than it actually is. It is almost impossible to capture in a photo just how pale the water is once coloured.

How long does it take for the dye to mix into a pond?
This depends on a number of factors including the size of the pond and the “stillness” of the water. The more movement of water, the quicker the pond dye will mix. If re-circulating pumps are used the mixing will take less time. The simple movement of fish can also help to distribute the dye.

Will the Dye damage water pumps?
No. The dye is completely soluble and will pass through pumps and filters easily.

Can dyes be used with other pond treatments?
Yes, dyes can be used with other chemicals provided that they are not Chlorine-based. Chlorine will attack the dye by bleaching it and rendering it useless.

What do I do with unused dye?
Keep it in a cool, dry place with the lid firmly in place and use it for “topping up” or the following years(s). Stored in this way, Parklink’s dyes have a long shelf life.

• Controls the growth of unsightly algae and weed
• Hides fish from predators such as herons and cats
• Gives a rich depth quality to water
• Creates a beautiful contrast with plants & shrubs
• Cost effective and easy to apply 

Non-toxic, safe and easy to apply

Commercial pond dyes are non-toxic, high-quality, food colours providing a cost-effective method of controlling algae and weeds without affecting the health of fish, wildlife and plants.

Parklink’s commercial pond and lake dyes are supplied in two forms; powder sachets to treat large bodies of water and a liquid solution for smaller fisheries and large ponds.

Water bodies have stress from both external and internal sources. Excessive rains or draught combined with the ongoing use of algaecides and herbicides deplete the microbial communities that are fundamental to nutrient removal in water bodies. This imbalance in the ecosystem leads to elevated nutrient issues and can result in excessive aquatic plant growth, continuing algal blooms, and HAB’s (Harmful Algal Blooms).

REGEN-Balance^® was formulated through years of research by obtaining samples from lakes and ponds across the Globe when water temperatures were mild. The natural microbial communities in the samples were analyzed to understand population densities and the specific organisms that are depleted by stresses. This research is how Parklink was able to create a probiotic that supplements natural populations and supports indigenous organisms that are functional and native to that geography. REGEN-Balance^® is more than simple additions of beneficial bacteria. It is a scientifically formulated probiotic that works in harmony with the microbial communities that play key roles in nitrogen and phosphorus uptake. Real science. Real Results.

Eutrophication is when a lake receives excess nutrients (phosphorus and nitrogen) from the watershed and from deposited sediments, called internal nutrient loading. These excess nutrients lead to poor water clarity, algae blooms, low oxygen levels and an imbalanced ecosystem. Nutrients need to be maintained in lower amounts with good water clarity to promote a naturally balanced ecosystem where aquatic life thrives.

REGEN-Floc^® completely reverses eutrophication by removing excess nutrients and turbidity. This one-of-a-kind proprietary formula of select bacterial cultures, flocculant, and phosphorus binders works in synergy to provide a complete restoration solution that permanently binds phosphorus in water and sediments, reduces nitrogen, and removes unwanted turbidity.

– Breaks down organics and binds phosphorus in the water column
– Improves water quality and clarity within hours
– Eliminates internal phosphorus re-cycling from the sediment
– Safe and easy liquid formulation with no irrigation restrictions
– Does not impact water pH or alkalinity
– Maintains desired turbidity, TSS, and Secchi