Before I get lashed at, I did put a question in the algae spot but no response yet. I have rescued a 30 gallon fish tank and everything inside (include 1 Glo tetra). The people left the tank light on all the time, creating black algae. What is the fastest way of killing it and cleaning. I was advised by someone I wouldn't trust, to do a bleach bath. What is the group's opinion/expert advise?