I have a 55 gallon FOWLR with a huma huma picasso triggerfish, clown grouper, and a volitan lionfish. My tank has been set up for 4 months now but dont have any algae growing in my tank except for the return sponge from the protein skimmer its red. i was wandering why wasnt nothing growing, somebody told me there need to be a lot of water circulation. What do you think??