Hydra Blue Powder Dye 

Hydra Blue Powder Dye 

Our Price:  £63.90
List Price:  £73.47
Saving Of:  £9.57 (13%)
(Inc. 20% VAT)(£53.25 Exc. VAT)
Pack Size:

See all Hydra Water Dyes

For Pond/Fountain Water Volume Calculator Click Here



In stock, immediate despatch

  • Packed in 100g water-soluble pouches for clean, easy application 
  • 1 kilo treats up to 1 acre/1 metre deep (4,000,000 litres)
  • Vibrant blue colour. Makes water appear deeper
  • Stops light from reaching the bottom. Inhibits or halts algae/weed growth
  • Safe for use in natural swimming ponds & swimming pools
  • No pesticides and herbicides, harmless to fish, plants, and wildlife.
  • Shelf life 3 years.

Brand:  HYDRA

Three times stronger in comparison to liquid dyes.


  • No pesticides and herbicides. Harmless to plants, fish, filters and wildlife.
  • Mixes quickly in the water with no undissolved lumps left behind and spreads across water within minutes to create a natural blue finish and shadow effect.
  • Greatly adding to the reflective quality of the water in lakes, ponds or water features.
  • Coloured/dyed water provides a beautiful background for the water plants adding to the aesthetics of your garden ponds.
  • No harmful herbicides and pesticides.
  • Safe on filters, ornamental lilies or other water plants.
  • Aquatic life remains safely hidden away from the predators under the dyed water.
  • Widely used in leisure lakes, angling clubs, golf clubs, local authorities and by fish breeders.
  • A pair of protective gloves supplied with the dye to save you from staining while handling the concentrated product.

Note: Use Hydra Aqua-Brite with Hydra Powder & Liquid Dyes. Do not use with chlorine or any other product unless specified by Hydra International Ltd.


Hydra Blue Water Dye adds natural and vibrant sheen to the water body, transforming a normal waterfront to an aesthetically appealing view in your garden or outdoors. Apart from hugely enhancing the beauty of ponds or lakes, the water bodies coloured using pond blue dye retain colour for months with re-application usually not required before 3 months.

Hydra Blue Water Dye is ideal for use by fisheries, angling clubs and in water traps on the golf courses. These water bodies are often situated near the fields that receive fertilizer treatment. The water runoff from the fields when reaches lakes or ponds provide a perfect breeding ground for algae blooms and green water.

The reflective property of dyed water greatly increases, giving lakes or ponds a vibrant look and stunning background for the ornamental aquatic plants.


Pond weeds, like all plants, algae and many bacteria, use the energy from sunlight to convert carbon dioxide into organic compounds, most typically, sugars. Without sunlight, photosynthesis could not occur and life as we know it could not flourish. Because they can synthesize food directly from carbon dioxide using light energy, pond weeds are classified as photoautotrophs. Most appear green in colour due to the light-collecting pigment known as chlorophyll-a. Hydra Blue Dye Powder is useful in prohibiting pond weeds and algae. By using a non-toxic colorant in the water, you can partially filter sunlight, thereby thwarting the photosynthetic process for many aquatic weeds and algae's.

Dilution Rates

1 kilo treats up to 1 acre/1 metre deep (4,000,000 litres)

• Packed in 1 kilo pouches.

• Retreat approximately every 3 months.

*Please note that all images are for illustrative purposes only, Actual colour may vary depending on pond water conditions.

Can I use this dye if I have fish in my pond?

Yes. Hydra Liquid dye is food grade dye, and it is completely safe for fish, plants and invertebrates.

My dog sometimes drink water from my pond. Will it be okay?

Yes, absolutely. Dogs, cats, birds, wildlife - this food grade based dye is safe to be used for drink.

Although, if your dog often drinks pond water - be aware of Blue Green Algae https://www.bluecross.org.uk/pet-advice/blue-green-algae-and-its-dangers-dogs

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. You can also add more water, or partially change water to dilute dye. 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 it might concern other people if they see odd colour in flowing water - they might report it to authorities as ''pollution''. 

Can water dye leave stains?

Yes, but nothing that can't be washed. It will most likely stain your hands and clothes - that's why it is recommended to wear gloves and protective clothes when using our product. Also, when diluted - it might stain the rock or surface where the water touches, but it is nothing permanent - sunlight will fade any residue.

Can we use more than recommended?

Absolutely! Our recommendation is top maximum that our dye can work and still be visible. Please wait 24 hours before adding more solution to the water, as sometimes it takes time for colour to 'settle in''. However, if you are using more than it is recommended - you can expect colour to be darker, more vibrant and water can seem deeper.

In case you overdo it, nothing to worry about. It will fade out with either rainfall or sunlight, or you can dilute water with adding more water or partially changing water. 

Be the first to Write a Review for this item!

Related Products
Hydra Black Powder Dye
Hydra Black Powder Dye
From:  £63.90

Packed in water soluble pouches for clean, easy application

Hydra Trak-It Blue - Spray Pattern Indicator Dye For Use With Herbicides & Fertilisers
Hydra Trak-It Blue - Spray Pattern Indicator Dye For Use With Herbicides & Fertilisers
From:  £10.99

Dilution rate 1:1000 (100ml treats 100L)

Hydra Turquoise Blue Liquid Dye
Hydra Turquoise Blue Liquid Dye
From:  £17.55

Transforms your body of water with a Turquoise finish