Called Coraline algae correct? Well, my tanks been running for awhile now since 09 July, and in febuary my light bulbs died, so untill June I havent done anything to tank besides still have filter and power head running keeping the water cycled, but for 4 months it was left in total darkness, but yesterday at lfs I got water tested and bought new light bulbs. 0 Nitrite 0 Nitrate 0 amona 8.3 ph? I cant remember exactly. I only had simple water tested, but while light was down for 4 months, I didnt have anything in there besides harmit crabs and snails, which seems to still doing fine, and currently got hair algae all over the place. What do you think will help coraline algae grow back? the live rocks gotten white while my lights were down.