I am having an algae bloom in a 2 1/2 month old tank of green algae. I have a cleaning crew of 20+ hermit crabs, both scarlet and blue leg, 20 turbo's, emerald crab, 4 sand sifting snails, cleaner shrimp and one perc, one maroon. By the way the tank is 20 gal. 10 lbs live rock and more to come...