Blue green algae has infested my tank, covering parts of the glass, gravel, heater etc. I have red cherry shrimp in there and am wondering if it is deadly? The bacteria most likely grew because I decided to leave dead shrimp in there which has probably decomposed into ammonia for the bacteria to grow off, I also leave the lights on for around 14 hours a day. Is this bacteria deadly to my shrimp? Three of my shrimp died and I have no idea how, maybe from eating the bacteria? It won't bother me if it isn't deadly, just want to keep my shrimp safe. Sorry for asking a question on this thread.