CrystalClear Barley Extract Water Garden & Fountain Clarifier, Natural Liquid Concentrate to Treat Cloudy Ponds, Koi Fish, Plant & Pet Safe, 1 Gallon

Works great! I had a lot of algae and it took about 10 days then all of a sudden it was gone.

I had a swimming pool that 11 ducks moved into and created a mess with waste and since I stopped using chlorine, a ton of algae. Although it's hard to say what was waste and what was algae at some point, the product clearly works. The water color went from solid to clear in a matter of a few weeks. You have to use double the dose (I suggest triple) . Ducks drank directly from the treated water and no health concerns which was my biggest worry. Better if you start using it right away before the algae gets out of control.

Our pond used to have a lot of scum at the top I have been using this for two summers and scum has been just minimal now fyi our pond is for fishing

it works to help maintain algae, along with some other things

The clear pond water barley extract helps. Much easier and more efficient than barley straw. Vendor sent as scheduled.

We have a 3000 gallon koi pond that our UV light went out on the end of last year. We had high hopes this would work and would keep us from needing to order another UV light and run electricity.At first I used the recommended amount. After a couple days it didn't seem to be changing at all so I used the recommended amount again. A few more days went by and nothing changed so I doubled the recommended amount. After a week of nothing changing I decided just to pour the rest in, surely that would knock out the green and get us back to clearer water. Another week went by and absolutely no change. This stuff did not work in our 3,000 gallon pond and the 1 gallon bottle we purchased is actually rated for 64,000 gallons. We purchased the gallon jug because I was expecting to be able to use it for the rest of the year. Using the entire gallon jug on a 3000 gallon pond I expected our pond to be fairly clear within a week but we seen no change in the green water.I ended up going ahead and purchasing a new UV light like we've used in the past and it cleared up our pond within 2 weeks like the other UV lights have done in the past. With the UV light we were able to see a noticeable difference within a few days.

Nice expensive tho

Just recently used this. It has killed all the beautiful moss in the several waterfalls in my water feature. It must be stronger than the Microbe-Lift barley grass I usually use. That’s why I only gave 3 stars. Think I will stay with algaway and regular barley grass…..must say the micro-lift barley grass is weaker.