Recently I've began to up the amount and number of times I feed my fish gradually, however; several types of algae have popped along the glass. I currently have an eheim 250, marine land bio wheel 250 and an aquaclear 110 on the 29 gallon with two hydor koralia 425s. The tank is stocked with black sand, a large centerpiece rock and 6 juvenile high quality blood parrots. Please spare me the details and unethical ways of manmade fish as I understand and do not fully support the ways but adore the fish! Thanks!