I can tell you one thing---I've got the worst aiptasia outbreak of my life directly after nursing the tank (with 4 surviving fish and the corals) through an 8 day snowy power outage---lost fish under the rockwork, lost worms and other inverts, and aiptasia took off like you wouldn't believe. I'm very suspicious that the aiptasia are battening off the dead and decaying matter that gave us tons of nitrate (over 80). That is now down to 60 and falling pretty fast with water changes...
The only reason I'm not cursing the aiptasia, despite the nuisance they are to the corals---is that I'm betting they're sopping up excess nitrate and nastiness and helping uptake the effects of the dieoff. Ultimately they're going to have to go, but if they're helping my tank recover from what it's been through I'm not hating them too much.