I have some large peices of live rock in a 30 gallon reef tank that are almost covered in hair algae. There are no corals on these pieces of rock. I want to clean these rocks. What is the best way and can I prevent growth of hair algae on them after I clean them? BTW I don't want to kill the snails and pods and such in the rocks when I clean them. Basically I am looking for the best way to rid myself of this hair algae now before I need the rock ledges to perch coral onto. I don't wanna affect my bioload so I am gonna do one rock at a time. What do you think?