Hey guys and galls, i have a green hair algae issue. My tank is about 1 yr old and for the past couple monthes ive been fighting gha. My lfs told me that the hawiian black sand i have has a lot of iron and obsorbs of phosphates until it cant anymore and starts leaching back into the system causing the obvious algae problems. They told me the only way to fix this is remove the sand and replace it with white sand. I just want to know if anyone else has had this issue or heard of this. Im would like to just go with a bb tank if im going to pull all my sand out anyway. Also I have a pistol shrimp and goby that im worried might not like a bb tank too much. Any info you have is much appriciated. Thanks, Cody