So I'm building a little platform out of an old rock that I used to have so here's what I did first I took a few rebel rocks out of my refugee home I put them in a cup of h3o which would be hard hydrogen peroxide. The next step would be to let those soak so I took three rocks out because this rock isn't very big might use four minus five I'm not sure so after they've been soaking for about 45 minutes take them out under hot water and run them off it doesn't really matter if you kill the bacteria because the rocks should help reestablish the ones on the robo Rock