Hey I have had my tank running for a few weeks or so with fish and corals in it. I have been getting alot of brown algae on the sand as well as on the rocks. Also it looks like brown strands or hair are coming off the rocks every few inches...real thin, is this hair algae? Howe can I get rid of it? I have been doing a lot of water changes lately to get the phosphates down to 0. Everything else is in normal parameters. I use tap water too BTW. I have my lights on for about 10 hours per day, but have alot of corals, zoas mainly and a few other things like rics and xenia. Please help before this gets out of control!