Natural Pond Cleaner, 60ml, Clarifier for Fish Ponds, Safe for All Aquatic Life Including Koi, Pond Water Clarifier Treats Up to 60,000 Gallons

This product is a must for your pond! I have used it for about 4 years now. A little goes a long way! You do not need to run the uv light on your bio filter and it is all natural! It is expensive but lasts and makes your pond water super clear. It is worth it! You have to try it!! You just put in enough for the size of your pond once a week. When the temps get cold...like winter I run my pump bio filter and you put it in one a month for maintenance. We live in Southwestern Ontario, Canada

I have been using this product on a 800-gal koi pond with one large koi and two shubunkin goldfish. Bottom line, it works great at stopping free-swimming algae. The water in my pond is very clear and clean. My fish are healthy. I was using a traditional algaecide before I switched to Nualgi, and my main reason for switching is that my cats and neighborhood wildlife like to drink from the pond and I didn't feel great about these animals drinking the algaecide, even at diluted concentrations. Even with the algaecide, I struggled to keep free-swimming algae at bay, and the pond water often looked murky. The plants in and around the pond were dying. Total water changes and pond bottom cleanings did nothing to help. I was using beneficial bacteria but to no avail. I switched to Nualgi in the spring, after the winter cold killed off most of the algae that had bloomed in the summer and fall. Right away, I noticed that string algae was forming on the waterfall that is part of the filtration and aeration system, but the floating algae was not coming back. Two years later, I still have zero issues w/ swimming algae. I do get string algae on the waterfall still, but that is easy to pull off in clumps and does not affect the clarity and quality of the water. The fish are healthier and more active, and the plants in the pond all came back to vibrant life. I did not change any other aspects of my pond care regimen, other than changing to the Nualgi. The beneficial bacteria colonies have rebuilt themselves in the pond and the Nualgi seems to work in a complementary fashion with the colonies to make my pond clean and clear. Nualgi is a great value for the price, bc so little goes a long way. I add about 1/4 of a tsp once a week -- that's it. So easy. Highly recommend you give it a try, but wait until your algae has died off a bit. I didn't find it effective in clearing a murky pond but rather in preventing the swimming algae from taking over otherwise clear or decent water.

The product works. I have successfully used it two or three times over the years and it does what it says it does

Product certainly seemed to help clarify pond but I also introduced a uv light at the same time so they may well have worked together.

This stuff really works miracles. We struggled with string algae for years in our 1600 gal goldfish pond. We had a good pump, filter with U/V etc. but nothing seemed to help. About 4 years ago we started with Nualgi and in a couple of weeks string algae just about disappeared and the pond was crystal clear. Since then we just squirt in a maintenance dose and thats it! I really can't say enough good things about Nualgi. FIsh are healthy, froggies always seem to find a place to hang out and no more nuisance algae. The UV light stopped working last year and we did not bother to replace it.