I've got the same tank at work. It started out kind of like this but it has morphed itself into a gsp tank! I've still got a few mushrooms and zoas but the gsp is working on those. It's been up for about 2 years and doing well. I keep a nemo for the office crowd and a few snails. It's been fun watching the gsp battle. When it finally wins it will be time to start over.