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

Having tried numerous products over the summer months, with little success, I thought I’d give this ago, it arrived yesterday, I only have a small pond with a home made plant pot filter with different filter medium in it, bedded in the middle is a pond sponge filter which you attach an airline to, mines run by a solar aerator which has a back up battery. Anyway, I did a water test before adding the solution, I have 190 litre pond, but it said you could triple the dose, so I added 15ml to a watering can of water from my water butt, I try not to use tap water, after day 1 I’m quite impressed the pond is already visibly clearer and I can make out the fish at the bottom. I will add an update in a few days 😀UpdateWell after 7 days, my pond is now crystal clear, it works brilliantly, for clearing murky green water. My pond was left like that after I had blanket weed in the pond and hair algae, I used another product to clear that first. 😁

Arrived promptly. Easy to use with measure in top. Have used it twice . Pond still not crystal clear.

Good product, have been using it for a few years already.

Using it as directed. No obvious improvement in water quality.

It takes time to see results with this product. The scenario which we faced was a 200 litre water feature in which my wife had placed two goldfish, pebbles and some plants from our natural pond. Very soon the water and pebbles were totally green and drastic action was needed. We had a smalll solar pump and filter which was not up to the job and therefore we have installed a budget mains powered combined filter and pump; this aerates the water very well and filters it too.So how has this product performed? Not too well at first and I believe that this was due to the pump and filtration system, which whilst solar powered, had an additional battery powered option, which we used to ensure 8 hours of filtering a day. We persevered and purchased a better pump and whilst this had a UV lamp which is constantly on, the combination of the two is addressing the problem. The method which we use to treat our pond is to remove about 8-10 litres of water from the pond, dose it with 25ml of the agent, stir it well and then leave it to develop for 24 hours before introducing it to the main pond whilst the pump and filter is switched off - we leave it for 12 hours and then switch the pump back on - the UV lamp will kill the bacteria created by the concentrate, but we believe that it multiplies sufficiently to remove the algae in sufficient numbers to survive the UV light for an extended period of time..So why 4 stars? Well this is an intermediate report, however, I think that whilst this product has contributed, so has the new pump, plus I get really irritated when suppliers contact me asking me to review their products too soon, not once, but twice, particularly as from their own instructions they suggest that you may not see results for weeks.+++UPDATE+++A month later and 5 doses of the product the water in the water feature is clear and the large cobble pebbles are losing the algae at a rapid rate. I intend to continue dosing the water feature through the winter, probably once a fortnight initially as the water feature is in a shaded area and will not have any direct sunlight at all until the spring, plus I believe that the low water temperature will not promote algae to grow either. If I am wrong I will increase the dose - suffice to say the water is now clear - a combination of pump and this bacterial agent.In essence, I believe that this product, combined with a better pump and filter; which I clean each week has aided our relatively small pond to rid itself of algae. I now have to buy netting as the clear water has already ensured that the heron has been spotted in our garden and whilst the water feature is very close to our house, I have no doubt that in the spring, the heron will pay a fleeting visit - in every silver lining lurks a cloud.I will re-review this item in a couple of weeks to see if my small water features water condition has improved still further - certainly the debris being removed from our filter suggests that it will and that this product is contributing.

After eventually using the whole bottle my pond is still green with algae. Very disappointed. (And yes I did follow the instructions carefully.)

Used it twice so far and little to no clearance that I can discern

Not cleared yet but it says it will take time