I have been using Bioclean Aqua Fish for the past seven months in my Koi pond. I have seen a significant difference in algal growth in the pond. The TDS metre reading of water is an indication that this product works well to disperse solids and I can see the bottom of my pond. I used to clean my mechanical filter daily, but after using Bioclean Aqua Fish, weekly cleaning is all that is required. There is an improvement in the feed intake as well.