My tank is a 45 gallon AIO and the display portion is probably close to 30-35 gallons. I also have a melanurus wrasse that I'm afraid will eat them. I've considered getting some peppermint shrimp but I have a lot of softies and LPS that I'm afraid they'll pick at. The aiptasia population is starting to get out of hand. I've used so much aiptasia-X but they seem to keep spreading