My tank had a huge crash recently a few months ago I lost all my xenia and got brown algae everywhere. I changed from tap to RO/DI water and did a 50% water change and reduced the light cycle and it seemed to be getting better. Then I added about 45lbs of rock my cousin gave me fresh from his tank and the brown algae got worse and now my carpet anenome is dead and my algae blenny died (looked like he starved to death) and my acro is starting to deteriorate. Is my RO/DI bad? or is it the Rock. Should I remove all the rock I added? I'm very confused and about to give up.