I replaced my metal halides and had a huge algae bloom. I took out many of the rocks and scrubbed off the algae with a toothbrush, but I could not remove it all (At least not without disassembling the WHOLE tank) So the algae came back as hairy as ever. I did try keeping the lights off for about 2 or 3 weeks, no change. So here is my question.... What if I take out every rock that has the algae on it and put them in saltwater in a garbage can with a heater and circulation and keep the cover on tight? Do you think this lack of light would kill the algae but leave the critters alive? If so, for how long should I do this? Also, the rocks that have corals on them, I'm going to leave in the tank. Would the little bit of algae on them eventually spread to the whole tank causing this problem once again? The phosphates on the tank, the water, and the salt mix all come to zero. I just changed the replacement filters including the membrane on my r.o/di. Thanks for any help. This is so frustrating.