So I am trying to get rid of my algae problem.. have been doing 15 percent changes with ro water only and it seems to be helping but I still have .25 phosphates... Are there any phosphate removers that are reef safe? I was using phosguard and noticed my mushroom closed up. I though he was shedding but has been closed up for 8 days. Via research I found out that phosguard is not recommended for reef tanks so I pulled it out. I hope my mushroom opens back up, all my other corals seem fine so maybe its just an extended shedding? Any ideas?