Envii Pond Klear - Natural Green Pond Water Treatment, Clears Green and Murky Water for Crystal Clear Healthy Water, Safe for all Fish and Wildlife -1L Treats 40,000 Litres

I purchased this product August 2024. If you are looking for a quick fix this isn’t it, however, if you’re patient and willing to wait then I don’t think you’ll find a better product than this one. At first it took about 2/3 weeks and water went from a pea soup green to a significant improvement, from then on it gradually got better and better. Over winter it continued to work and by spring this year I can see all my oxygenating plants which seemed to have thrived to the extent I’m going to have to clear some out! A friend who knows a lot about pond keeping was so impressed at the clarity of my wildlife pond water he is going to order some of this product. It also seems to have held keep the blanket weed at bay! I am really very impressed with this and I hardly leave many reviews only to warn others about really bad products or to give a excellent review whenImthinkmit has deserved it and this certainly does, but please be patient with it and I really don’t think you’ll be disappointed!

Took a little longer to work than I had hoped but the pond was very cloudy. Certainly works well.

Works really quickly and good results. Removes algae.

It’s definitely improved my pond but still not completely cleared the water. Will keep trying

Doesn't work overnight, but after about 2 weeks of putting it in if now have crystal clear water instead of murky green, and can now see my fish again. I'm impressed.

In a word useless. Followed the instructions, dosed correctly, water is greener than ever. I have been a pond keeper for many years, unusual to have green water in my main pond, so bought this product. Very disappointed that it has failed to give me crystal clear water.

It workedQuite quickly too, although only in a water feature so can't comment for pond of any size

Worked very well on our pond