Uncle Ned. I am having a problem with Black algae and green hair algae in my 45gal reef tank. I have done all water tests and everything seems to be ok but the green algae seems to be going everywhere. All over the live rocks and on my soft corals. The black algae is not as bad. I have only seen it on a few rocks and on the tank glass. What can I do to control this problem? I keep removing the hair algae from the rocks by hand and I am worried that it will suffocate my corals and mushrooms. Can you please help with any suggestions? thank you