Hydra Blue Liquid Dye

Hydra Blue Liquid Dye
Pack Size: 100mlPack Size: 250ml (upto 31,250L)Pack Size: 500ml (upto 62,500L)
Pack Size: 1L (upto 125,000L)Pack Size: 5L (upto 625,000L)Pack Size: 4x5L (upto 2500,000L)
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

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Brand:  HYDRA

  (15 Reviews)
  • Vibrant blue colour
  • 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, 1 litre treats up to 125,000 litres

Pack Size Treatment
250 ml Treats up to 31,250 Litres
500 ml Treats up to 62,500 Litres
1 Litre Treats up to 125,000 Litres
5 Litre Treats up to 625,000 Litres
4x5 Litre Treats up to 2,500,000 Litres

Features & Advantages

  • Hydra Liquid Blue Pond Dye is highly concentrated; therefore the recommended application rate is very low.
  • Dyed water is harmless for fish or pets, wild animals, plants or filters.
  • No harmful pesticide or herbicide added.
  • Gives vibrant blue finish to the water.
  • Quick dissolving dye spreads fast through out the water body to give desired blue shade in the water.

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 Liquid Blue Pond Dye is an environment friendly and non toxic. This highly concentrated liquid dye by Hydra gives beautiful blue finish to the water and stops sun rays from penetrating deep inside the water.

Hydra Liquid Blue Pond Dye is widely used by pond hobbyists as well as by hotels and commercial premises to maintain an aesthetically pleasing water body.

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

Average Rating (15 Reviews):  
Write a Review and share your opinions!

What I was looking for
Thursday, 27 February 2020  | 

I use it for my pond of about 1000 liters &very small amount is enough!
Be careful not to overdo it because the effect is really strong!
I ventured with a drop in a tub in a tub and I had to change the water 😅
Dosed with a syringe it is perfect!

Was this helpful to you?  Yes  /  No

2 of 2 people found this review helpful.

Eliminates blanket weed
Tuesday, 20 August 2019  | 

This product will help eliminate blanket weed and will give the pond a lovely blue tinge. It has good clear instructions and doesn’t harm the fish or plants. Excellent products.


3 of 3 people found this review helpful.

Fantastic fountain
Friday, 19 July 2019  | 

I have a fountain and am very happy with the effect given especially at night when the fountain is lit up. Plus it doesn't stain the stone will order again.


4 of 4 people found this review helpful.

Fantastic effect
Wednesday, 19 June 2019  | 

Gives a fantastic shimmering effect to my pond water, very strong so only add a few drops at a time you can always add more if required, seems to last a long time in the water.


3 of 3 people found this review helpful.

Transfomed my pond
Friday, 22 March 2019  | 

Has transformed the look of my pond. Make sure you wear plastic gloves when using.


3 of 3 people found this review helpful.

Spectacular colour
Friday, 29 June 2018  | 

I have used water dyes from other companies in the past, so based on that experience I bought a 500ml bottle. This Hydra blue liquid dye is definitely much stronger, it will properly last me a lifetime. Gave a spectacular colour, colour shades change depending on how much you add. I would highly recommend this product to anyone that is look for a blue dye for their pond or water feature.


6 of 6 people found this review helpful.

Highly concentrated
Friday, 27 April 2018  | 

Very strong product, you only need a tiny amount, gives a great blue in the water showing off my aquatic plants in the shallows.


4 of 4 people found this review helpful.

Great blue colour
Tuesday, 11 April 2017  | 

Hydra blue liquid dye has given my pond a great blue colour. It's doing its job very effectively preventing the algae from growing and blocking my pump.


4 of 4 people found this review helpful.

Stopped the algae from growing
Wednesday, 10 August 2016  | 

Has 100% stopped the algae from forming in my pond, fish seem to be less anxious as predators can't see them as easily. This product is very strong so add it very gradually, it is easy to overdo it. With each addition, allow at least 20 minutes for the pump to circulate the dye throughout the pond before adding anymore.


7 of 7 people found this review helpful.

Looks great
Wednesday, 29 June 2016  | 

My pond is directly in sunlight most of the day so with this product it has really cleared up my pond. The pond looks very impressive and still looks great but I will very be trying out the black liquid dye next time.


6 of 6 people found this review helpful.

Read all 15 customer reviews...


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