So about 2 months ago I basically replaced everything in my fish tank because green algae took over. All was well for a while, until those little green spots started multiplying more and more. I've cleaned the tank, moved the tank out of direct sunlight, purchased otto cats, and perform pwc every week...STILL ALGAE. I'm getting concerned because its growing all over the leaves of my bamboo shoots and I just don't want it to take over the tank again. I read that you should avoid using chemicals to remove algae is it can harm fish/plants...so what should I do???