I have a 75 gallon with only small fish (1 MM Platy adult and 4 babies, 1 Black Molly, 2 glofish, 3 neon tetras, 2 red velvet swordtails, 1 otocinclus (sp)). I've recently had an algae outbreak on my live plants, deco, rocks, and glass. It's not a super amount, but just enough to drive me...