Alright so I'm working at my LFS and there's two nice zoa and red mushroom colonies that I can get for cheap. Problem is, I don't have my RO/DI filter yet or my LED fixture. I'm currently running two 15w T8s and tap water. My inverts are fine and I have great coralline growth. I do about a 30% WC weekly and have no algae problems except for a little cyano but it's nothing bad. I'm wondering if these corals are going to be fine for 3 weeks MAX without RODI and higher lighting. I know they are hardy as well. Oh and it's a 17G