---
product_id: 53132383
title: "envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres"
brand: "envii"
price: "€ 56.24"
currency: EUR
in_stock: true
reviews_count: 13
category: "Envii"
url: https://www.desertcart.gr/products/53132383-envii-aquarium-klear-natural-bacteria-clears-green-water-treatment-crystal
store_origin: GR
region: Greece
---

# Up to 12 months treatment Clears 4,000L of green water Billions of natural bacteria envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres

**Brand:** envii
**Price:** € 56.24
**Availability:** ✅ In Stock

## Summary

> 💧 Clear water, happy fish, zero hassle—make your aquarium the envy of every enthusiast!

## Quick Answers

- **What is this?** envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres by envii
- **How much does it cost?** € 56.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/53132383-envii-aquarium-klear-natural-bacteria-clears-green-water-treatment-crystal)

## Best For

- envii enthusiasts

## Why This Product

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

## Key Features

- • **Long-Lasting Value:** One 500ml bottle treats up to 4,000 litres, keeping your tank sparkling for up to a year.
- • **Effortless Maintenance:** Reduces filter clogging and tank cleaning, giving you more time to enjoy your aquatic haven.
- • **Crystal Clear Every Time:** Harness billions of natural bacteria to banish green and murky water for a pristine aquarium.
- • **Safe for All Aquatic Life:** 100% natural ingredients ensure your fish and plants thrive without any harmful chemicals.
- • **Precision Dosing Made Simple:** Built-in measuring chamber guarantees the perfect treatment every time—no guesswork needed.

## Overview

envii Aquarium Klear is a 500ml natural bacteria-based treatment designed to clear green and murky water in fish tanks up to 4,000 litres. It safely eliminates algae and harmful toxins, reduces filter maintenance, and supports a healthy aquatic environment with easy, precise dosing for up to 12 months of use.

## Description

Free delivery and returns on eligible orders. Buy envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres at desertcart UK.

Review: Clears away algae; easy to use. - Seems to be working nicely inside my fish tank. The algae that has developed on my rocks is disappearing. It is apparently completely safe for the fishes and also helps to keep the filter sponges cleaner too. Recommended to add to the water weekly.
Review: Very good product - Yes I've bought this product many times and will keep buying it's a good product that does what it says 5 star's

## Features

- Clears Green & Murky Water in Fish Tanks – Aquarium Klear contains billions of beneficial bacteria to clean green & murky water in fish tanks for crystal clear water.
- Safe for All Fish & Aquatic Life – Containing only natural ingredients, our aquarium treatment is safe for all fish & aquatic life including.
- Reduces Filter & Tank Maintanence - Naturally removes excess fish waste, fish food & harmful toxins. This ensures your filters run efficiently meaning less cleaning, tank maintanence and happier fish.
- Easy to Use – With a built-in measuring chamber, each treatment can be accurately measured and used with ease. Simply add 5ml of Aquarium Klear per 40 litres of fish tank water. All dosage instructions are on the bottle.
- Treatments – 500ml bottle is enough to treat 4,000 litres of aquarium water. This gives you multiple treatments to last up to 12 months.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B077FR51B7 |
| Allergen Information | Allergen-Free |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 3,346 in Pet Supplies ( See Top 100 in Pet Supplies ) 39 in Aquarium Water Treatments |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,073) |
| Date First Available | 14 Nov. 2017 |
| EU Energy Efficiency Label | A |
| Item Form | Liquid |
| Item Weight | 550 g |
| Item model number | AK01 |
| Number of Items | 1 |
| Package Dimensions | 17.9 x 10.8 x 5.9 cm; 550 g |
| Pet Life Stage | All Life Stages |
| Quantity | 1 |
| Size | Aquarium Klear |
| Specific Uses | Outdoor |

## Product Details

- **Brand:** envii
- **Item form:** Liquid
- **Item weight:** 0.55 Kilograms
- **Liquid volume:** 500 Millilitres
- **Manufacturer:** Bio8

## Images

![envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres - Image 1](https://m.media-amazon.com/images/I/61SrjSGk6WL.jpg)

## Questions & Answers

**Q: I have a black fuzzy stuff on my plants will it get rid of it**
A: We had the same problem with Black Beard Algae, which is one of the hardest to get rid of. Especially because algae eaters don't like this. Now we have only a few spots here and there occassionally, but they never get bigger than 1mm, previously they were up to 5cm in length and covered large areas. We have 3 very strong lamps illuminating too.

What I have learned:

1. Water balance - this is where this and other similar products can help. They need a rough substrate or large biological filter to work as well.

2. Healthy living plants - you need enough plants to remove all other food from the water. Give them enough micro-element fertilizers, so they have an upper hand against algae. Grow at least one fast growing variety, which you cut back weekly and remove all excess plant food with this.

3. Algae and waste eaters - against algae the best is to have one Common Bristlenose Catfish (Pleco) aka Ancistrus sp, which is the smallest this kind of fish. This doesn't like Black Beard, but don't avoid this either, if there is any kind of other edible material in it. For other algae and waste you can have Amano shrimps and/or Assassin snails. Assassins will get rid of small unwanted snails as well.

4. Hydrogen peroxide - if you have big bushes of Black Beard, very carefully use pipette underwater to put a drop of food grade H2O2 in the middle of the bush. This reacts with photosynthesising elements of the algae and kills this. Keep fish and other animals (incl snails) in the other end of the tank for a few minutes and dont use too much of it. For 200l tank I have used up to 5ml 10% of H2O2/hydrogen peroxide. It is important to keep lights on and fish as far as possible, as this may burn their gills. This would be good to switch filter off during the treatment, depending of your tank layout. Too much and direct peroxide can kill good bacteria too, if this happens, use this product (or similar product) to replenish the bacteria.

I hope this helps.

**Q: Does it treat brown algae as well ?**
A: Yes, we have no data to suggest that it doesn't

**Q: Every week my fish tank keeps going green where am i going wrong**
A: Do you clean the inside of the glass on the tank because the envii aquarium klear won't work on its own . I also recommend changing the filters once a month as directed by filter manufacturer . Hope this helps .

**Q: Is this safe to use for my yellow bellied slider terrapins??? It does say all types of aquatic s fine but i didnt want to assume**
A: I have shrimps so only used half of what it said. Tells you on the back instructions.  They are very delicate shrimps so I suppose it would be fine with yours.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Clears away algae; easy to use.
*by G***N on 20 January 2026*

Seems to be working nicely inside my fish tank. The algae that has developed on my rocks is disappearing. It is apparently completely safe for the fishes and also helps to keep the filter sponges cleaner too. Recommended to add to the water weekly.

### ⭐⭐⭐⭐⭐ Very good product
*by J***N on 29 December 2025*

Yes I've bought this product many times and will keep buying it's a good product that does what it says 5 star's

### ⭐⭐⭐⭐ It works … but
*by M***E on 14 November 2025*

I have used this for 2 months . The pond is a Lot clearer and I can clearly see the bottom of the pond and my prized Sterlet his visible . But , I have followed the instructions and cleaned the filter material twice a week . So whether it’s the medication the regular cleaning of the filter or a combination of the two I can’t say .

## Frequently Bought Together

- envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres
- Envii Aquarium Chlorine Klear Tap Safe Water Treatment for Fish Tanks, Natural Water Conditioner & Dechlorinator, Chlorine Remover, Safe for All Fish & Aquatic Life, 250ml Treats 2,500L

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-09*