yes i use it when im spawning, it has lieters directions but i got all confused by them, in my 20 gal spawn tank, water raised to 6 inches i used 2 cap fulls or two squese fulls you will know what i mean if you see the bottle, and shake it up good cause other wise the tea bits all get left on the bottom, my fish loved it and spawned well with it, its basicaly ial tea, helps soften the water and keeps bubble nests togather good. also lowered ph which helps water stats espicaly the first week or two when too many water changes would kill the babies and i find it more benifcial to just leave the babies be with only opening the top for feeding ans to slowly add a little more water each day via a slow drip line.