I recently bought some rocks from an aquarium store and was wondering if there's a safe and easy way to clean them? I've seen so many different things, some say to just scrub in hot water and rinse it well but others say to use bleach or boil. I don't want to boil the rocks because I've heard it can make them explode and I'd rather not take the risk, and I worry about using bleach because I don't want to risk any bleach getting into the water even if I were to rinse over and over I'd be paranoid but would simply scrubbing with hot water and rinsing be safe enough? What's everyone's favourite methods? I've been soaking them for about 3 days now so would this make them clean enough?