I have no idea :dunno:..Haven't heard people talking about using this stuff, but from the website, it sounds like one of those too-good-to-be-true things. For right now, IMO, I would just let the tank cycle and do it's thing. The only thing you need to add now (since you already have the sand, rock, and water in there) is something dead that will decompose in there and start the cycle if you haven't already. Once the tank has finished cycling, then you can worry about how to keep everything stable.