I have a 15g bare-bottom tank that has an open top, a lot of BTA's, and two A. ocellaris. I am looking for recommendations as to one more small fish that I can add into the tank that won't become a quick meal for my BTA's. Also, the water movement in this tank is on the moderate to high side, if that means anything. I've been leaning towards a Royal Gramma, as it is a beautiful fish, and I've success with them in the past. I did hear from someone that they are ich magnets though -my experiences with them say otherwise, but does anyone else have an opinion on this?