I've tried all of the above! I have a 46 gallon heavily planted tank with 3 cory cats. I have put phosphate remover in my filter. I'm starting use with tap water filter just to make sure all unwanted chemicals are removed. I purchased amano shrimp, true SAE's and yet I still have black beard/brush algae. I'm going to try and get more SAE's but they don't seem to really eat the stuff good. I have heard you can use hydrogen peroxide if your extremely careful to kill some of it. I'm almost to the point of tearing the tank apart! In the future I'm not putting anything into my tank without dipping it in bleach solution first or quarantining it.