thanks for the word Jim - i had three of these in a 40g, they promptly got rid of the aiptasia and then ate each other (i think) and then there was two, and then there was one. Solo has remained for 4 mos. i allow the aiptasia to grow vigorously in the sump, and have none in the display. i'll go get some more for the other tanks and i think i will try to pair them again as they spawned continously and the ocellaris went piggy.