I let my tank cycle and my LFS ordered my clean up crew for me. I put everyone in and everyone seems to be happy. I would like to add another fish this weekend to keep my cleaner wrasse company, but not sure if i will be overloading my system. I have a 75 gallon display tank with a 20 gallon sump (sump has roughly 12 gallons in it). This is what I have in there now, will I be ok to add a clown or something small?\n \n50- Red Tip Hermit Crabs\n25- Turbo Snails\n25- Margarit Snails\n1- Sand Sifting Starfish\n1- Black Spine Urchin\n1- Sally Lightfoot Crab\n5- Emerald Crabs\n1- Cleaner Wrasse\n1- Cleaner Shrimp\n \n \nThanks in advance!