I have a 29G Bio Cube in my office at work. My goal is to have a BTA with a pair of GSM's. I'd also like to add a Sixline Wrasse, a Skunk Cleaner Shrimp and assorted corals - rics, zoo's and softies. I already have a clean-up crew, 2 Peppermint Shrimp and a Bristle Star. Is that too crowded with a pair of GSM's? Would my shrimp be safe. If not the GSM, any recommendations on a pair of clowns that will sit with the BTA?