Whatever you do DO NOT boil it!!!!! Term cooking rock is often misinterpreted, as people think that you literally need to boil and cook rocks. Bleach is easiest and safest way of killing everything on and in the rock to start over again with clean slate. If you dont know what you are doing with acid, do not use it! It is dangerous and can cause you many issues in a second if you arent careful. Also acid physically destroys layer of rock, so you loose about 10-20% of it, depending on how strong of acid mixture you use, and how long rocks are in the mixture for.I’m trying to clean off my rock because I am restarting my tank but I do not want to use bleach or boil it. Is there anything else I can let it sit in or other things I can do to clean it off?