Been using this for some
"Been using this for some years now, not had any issues with it. Just wondering though about the colour of the liquid because it’s not the same as my other bottle. Has it changed colour?"
£11.95
Unit price per500ml Treats 14,500 Litres
Chlorine Klear is a highly concentrated, food-grade pond dechlorinator that instantly removes harmful chlorine, chloramines, and heavy metals from tap water when topping up ponds with a hose pipe. Perfect for large volumes; just 500ml can treat up to 12,500 litres of water, making it one of the most powerful dechlorinators available.
What sets Chlorine Klear apart is its ability to work year-round, with no temperature-controlled ingredients required, ensuring it’s effective in any season. Using Vitamin C, a natural and safe way to neutralize chlorine, Chlorine Klear eliminates chemicals from tap water quickly and effectively, providing a safe environment for your fish. Unlike sulphur-based alternatives, Vitamin C is gentler and safer for your pond’s ecosystem.
Protect your fish and keep your pond water healthy with Chlorine Klear—the best solution for making tap water safe for your aquatic friends.
If you have any questions or need any advice, call us on 01246 240880, email us info@envii.co.uk, or chat live with one of our team.
Yes, as a food grade treatment, this product is non-toxic and is safe to use whilst your fish are in your pond. The product removes all chlorine from tap water instantly to keep fish free from gill burns or stress.
Once opened, we recommend you use all the product within a year.
The product should be used when you feel like your pond water needs topping up. Use in the tap water before applying all water to your pond.
The UV light does not need to be turned off when using this.

Overall rating: 4.830769 / 5 from 65 reviews.
Review topics: ["weather","value","problems","service","works","use","fish","bottle"].
"Been using this for some years now, not had any issues with it. Just wondering though about the colour of the liquid because it’s not the same as my other bottle. Has it changed colour?"
"Great product use it all the time to treat water before adding to koi pond. Reliable and will continue to use"
"Excellent - but wish larger bottles were available. ."
"Good product at a good price and usual excellent service Highly recommend these people"
"The products OK but the constant stream of emails asking "How bloody good are we eh?" puts me off using envii again to be brutally honest"
"I have only used once, it but it seems fine. I have no idea how to assess if it works. My fish are fit and healthy"
"It's a great product,but I wish it was available in much larger sizes! Eg 500 ml or 1 litre"
"Great product have used it several times, over the last couple of years. Would recommend any one with a pond to have it as a back up for toppin or filling your pond."
"Promo delivery. Will use this company again."
"Works exactly as promised"
Keep your pond crystal clear, healthy, and thriving with our premium pond treatments. Designed for garden pond owners, fish keepers, and wildlife enthusiasts, our range tackles everything from water clarity to nutrient balance, ensuring a safe environment for fish and plants.
Whether you need to remove green water, combat stubborn blanket weed, or improve pond health with effective sludge removal, our solutions are fast-acting, and easy to apply. Trusted by UK gardeners for all-season pond care, these treatments help prevent common problems and keep your pond looking its best year-round.