I have a Powerglo 18,000k 14w T8 bulb in my 5g hood light. Im getting all different kinds of algae. Staghorn, BBA, regular green, blue/green. Is this light too much for such a small tank? Or do I possibly need to dose more ferts? Plants are Bacopa, guppy grass and Anacharis. Sand substrate, Thrive C fertilizer. Sponge filter.