How do you convert a tank to Blackwater? I want to convert my community tank to a dark environment, that's the way I like things. My fish would also appreciate a tank that is similar to their natural habitat in the wild. Here's my current tank, it looks a bit different today. It's currently decorated with artificial decorations (because I cannot grow live plants at all) and has driftwood, lava stone, and black sand. My main reason for wanting to do this is because of my obsession with crystal clear water, which I cannot seem to get no matter how much filtration I put in this tank. I want to have stained water with leaf litter and broken branches scattered across the bottom of the tank. I have scavenger fish and shrimp so that would be perfect for them. Someone that knows about Blackwater, let me hear from you on this thread. I want to create the environment correctly.