---
product_id: 73891823
title: "HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg"
brand: "hydra"
price: "€ 87.15"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.cy/products/73891823-hydra-crystal-treats-upto-20-000-litres-pond-algae-green
store_origin: CY
region: Cyprus
---

# HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg

**Brand:** hydra
**Price:** € 87.15
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg by hydra
- **How much does it cost?** € 87.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/73891823-hydra-crystal-treats-upto-20-000-litres-pond-algae-green)

## Best For

- hydra enthusiasts

## Why This Product

- Trusted hydra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Full description not available

## Features

- Very Rapidly Removes the Pond Green Water to give you Crystal Clear Water     100% Biodegradable, Maintains Clear, Healthy & Clean Water in your Pond     For use with Exterior Filter Box to Remove the Treated Algae     Not Harmful for Fish, Biological Filters or Pumps Installed in the Pond     Shelf life 3 years, 2 Kg Treats up to 20,000 litres

## Images

![HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg - Image 1](https://m.media-amazon.com/images/I/71lBdYHaRkL.jpg)
![HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg - Image 2](https://m.media-amazon.com/images/I/81+lx3tYDBL.jpg)
![HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg - Image 3](https://m.media-amazon.com/images/I/81ztjqxgiIL.jpg)
![HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg - Image 4](https://m.media-amazon.com/images/I/81liEk4cGnL.jpg)
![HYDRA Crystal Treats UpTo 20,000 litres + Pond Algae Green Water Treatment 2x1Kg - Image 5](https://m.media-amazon.com/images/I/71TsRQLP26L.jpg)

## Available Options

This product comes in different **Size Name** options.

## Customer Reviews

### ⭐⭐⭐ 







  
  
    Pretty Good - think the pond weed killer + filtration and air system more effective.......
  

*by K***R on Reviewed in the United Kingdom on 14 July 2015*

It seems to have taken me ages but I finally appear to have achieved the right “balance” within my modest pond (say 3m diameter, round). I have bought:https://www.amazon.co.uk/gp/product/B004V7JJEQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B003GV6T9G/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00JXNEIDA/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00G96XHXQ/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00VLX203A/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00I4278K6/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B0077L4V8C/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00DJ1T4L8/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00LW0RD0M/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1https://www.amazon.co.uk/gp/product/B00SYS5GJ0/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1Which, to say the least, ought to keep my little pond running at perfect levels !I should also add that when we moved into the house, the pond already had a weak filter / fountain system. I’ve since re-attached that to the pond-spitters (the fairy and the cherub). When attached to the more powerful filtration systems it was like a garden sprinkler !Of all of this ‘kit’ the anti-blanket weed treatment has proved excellent – no signs of it 1 week after application.Without a doubt the main thing is the flitration system. However, I think that is closely followed by the air pump + air stones.I’ve obviously had to use a system of gravel / Cotswold stone to hide the pumps and lines. I now have beautifully clear water, cascading off stones into the pond. I have 30 + fish in the pond and since I’ve got the balance right, no fatalities.I also bought this, which was a disaster:https://www.amazon.co.uk/gp/product/B004R39F34/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1Basically the effect was to create ‘spiders web’ which algae could cling to at the surface of the pond. Although the water underneath was perfectly clear the anti-heron mesh ruined visibility….hence I replaced it with the galvanised mesh listed above which hangs 1 inch above the water and so doesn’t create a gudge-trap.OK: I think I may have gone wild on buying kit for the pond, but finally I’ve got rid of the niggles and have achieved a perfectly good biological balance…..Good luck fellow pondies !

### ⭐ 







  
  
    Didn't work.  Waste of money.
  

*by S***T on Reviewed in the United Kingdom on 18 July 2015*

I followed the instructions, adding the 2 Kg of the powder to water in 2 buckets to make a slurry which I poured into the top of our waterfall where the water from the external filters flows into our 20,000 litre pond.  A thin layer of something formed on the surface which I mostly removed from the pond using material in a net.  The surface then cleared of this substance, but the pond remained green throughout and several days later is still green.The attached photo is of the pond a few hours after adding the Green Water Control powder to the pond.  it looks the same, now.I'm sorry to say that the Green Water Control powder was a waste of money.

### ⭐ 







  
  
    Ddoesnt work
  

*by -***- on Reviewed in the United Kingdom on 1 June 2021*

It just didnt make any impression.  I thought when I used it last year that it made a difference but this year - nothing.  I find none of these  work.  Complete waste of money

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-04*