Hydra Black Liquid Dye

Hydra Black Liquid Dye
Pack Size: 100mlPack Size: 250ml (upto 1,063L)Pack Size: 500ml (upto 2,125L)
Pack Size: 1L (upto 4,250L)Pack Size: 5L (upto 21,250L)Pack Size: 4x5 Litre
Our Price:  £15.95
List Price:  £19.73
Saving Of:  £3.78 (19%)
(Inc. 20% VAT)(£13.29 Exc. VAT)

To preserve colour, use with Hydra Aqua-Brite

See all Hydra Water Dyes

For Pond/Fountain Water Volume Calculator Click Here

Brand:  HYDRA

  (12 Reviews)
  • Ideal for reflective pools give mirror finish
  • Reflective mirror finish to water
  • Extremely economical solution up to 3 years of shelf life.
  • Stops light from reaching the bottom. Inhibits or halts algae / weed growth
  • No pesticides and herbicides, harmless to fish, plants and wildlife.

Pack Size Treatment
250 ml Treats up to 1,063 Litres
500 ml Treats up to 2,125 Litres
1 Litre Treats up to 4,250 Litres
5 Litre Treats up to 21,250 Litres


  • Greatly add to the reflective quality of the water in ponds or water features.
  • Economical to use and easy to apply.
  • Provides an aesthetically appealing view.

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.


Applying Hydra Black Liquid Dye in water is a simple and easy way to give your pond or water features a natural, reflective and mysterious black surface.

With its quick dispersion quality and high concentration, its usage even in low quantity is enough to enhance the aesthetic appeal of your pond creating a mirrored surface. It safely protects and shades your pond in a black colour. Black liquid dye provides an impressive reflection to your pond surrounding.

Has been used by:

  • Farm Ponds.
  • Landscape Gardeners.
  • Garden Pond keepers.
  • Golf Courses.
  • Local Authorities.

Something New:

  • Black colour symbolises secrecy and solemnity.
  • Black represents an idea of power and style.
  • It creates an air of mystery and shows elegance.

I’ve been 40 years discovering that the queen of all colors is black.” – Pierre-Auguste Renoir


* Please note that all the images used are for illustrative purpose only. The actual colour may differ as it depend upon the pond water condition.

Average Rating (12 Reviews):  
Write a Review and share your opinions!

Immediate effect
Saturday, 1 June 2019  | 

Having only recently put in a small pond, our waterfall feature water turned green from the sun. I have been looking around for products to get rid of the green and saw Hydra Black Liquid Dye and a bonus they are near where I live. I put 20ml into the pond water and stirred it around and instantly the horrible green disappeared and the black pond liner was visible and shiny again. It doesn't stain the granite stone. I am very impressed with this product and a little goes a long way so should last a long time.


9 of 9 people found this review helpful.

Protects my koi
Friday, 17 May 2019  | 

Deeep black colour hides the fish. I have been tormented by an otter recently. Hope the dark colour stops her from feeding on my fish.


5 of 5 people found this review helpful.

Fantastic deep black
Friday, 19 April 2019  | 

Have used this in two water features, fantastic deep black and has not stained the fountains. The birds drink from these water features so I am happy that it is safe for them. Be careful though a little goes a long way, so under dose to start with, then if not black enough add more dye until you achieve the colour you require.


6 of 6 people found this review helpful.

Saved hours of cleaning
Friday, 24 August 2018  | 

Having had major issues with algae in my pond I had been looking for an answer for ages. Came across the Hydra black liquid dye on the internet, reviews looked good so I gave it a try. Boy am I glad I did, it has saved me hours of manual cleaning I simply treat the pond in spring and autumn for lasting effect.


7 of 7 people found this review helpful.

Perfect effect
Thursday, 12 July 2018  | 

Fantastic stuff. I had decided to do a project whilst in lockdown and create a water feature. I have learnt that green-ness will come along eventually even if you use clear water tablets and never turn off your pump. Today I tried the Hydra Black Liquid dye and am really happy. I used about 1ml for 300 litres of water and the effects are delightful.


4 of 4 people found this review helpful.

Highly reflective finish
Wednesday, 4 July 2018  | 

Makes my pond highly reflective, fish don't seem to mind the colour as they are still feeding normally. On first application only add the stated dose, as in my case I found that this made it dark enough.


7 of 7 people found this review helpful.

Fantastic mirror effect
Wednesday, 27 June 2018  | 

Gives fantastic mirror effect in my pond, really shows off the colours of my lillies.


5 of 5 people found this review helpful.

Its Amazing
Monday, 21 May 2018  | 

I was unsure If I was doing the right thing but I am so glad I did, it is AMAZING! It has restored my dull and sludgy rill which I built in the back garden into a professional reflection pool. Another bonus is that it is animal friendly so I don't need to worry when the birds drink and wash from it.


5 of 5 people found this review helpful.

Heron zero, Hydra won!
Friday, 18 May 2018  | 

Had major problem with Heron stealing my fish. None lost since using the hydra black liquid dye, as well as a great mirror finish to the pond. Think the heron has given up and gone elsewhere.


3 of 3 people found this review helpful.

Highly recommended
Thursday, 15 June 2017  | 

We have a small pond, you could see the water pump before which was unsightly. Used a tiny amount of the black liquid dye liquid and the water went totally black, pump is now hidden we are very pleased with the result.


2 of 2 people found this review helpful.

Read all 12 customer reviews...

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