I'm a skeptic. It says it's 100% organic and contains no chemicals, enzymes, or bacteria....so what is it? It sounds like a clarifier, which we Know is not good for stock gills.
My position is to steer clear of additives unless absolutely necessary - including even plant ferts. (In my 60g the Water Sprite needs some Flourish Comp every week, but it grows like crazy in the 37g (grow out) tank with no added ferts. Perhaps because the fish in the grow out tank are fed several times a day so there's likely more nutrients in the water.)
For crystal clear water, I sometimes run a Marineland Magnum Polishing Internal Canister Filter using the micron cartridge charged with diatomaceous earth. After a few short hours it's as though there's no water in the tank!