I started using a product from Seachem called Reef plus, it's concentrated vitamin & amino acid supplement. I have to say I'm very happy with the results, my corals have gotten bigger and more colorful and I'm also not getting as much algae on the glass. My skimmer seems to be pulling more gunk and my fish seem happier. I don't have any SPS in my tank so I don't know how they would react to this stuff, but for all the softies I have they seem very happy.