I have a 20-gallon nano any tips for me I have two clowns a firefish and a royal gramma for corals I have a favia I can't really tell what it is a ricordia mushroom a toadstool and a torch any tips with algae and keeping everything happy and what corals I can keep I'm thinking an encrusting Monti and policopora for sps? I've had the tank for 8ish months and I do 20% water changes weekly tips?