I learned this lesson years ago and ive never bought a damsel since. Last one i had was a blue damsel, had him for 3 months then suddenly he went crazy killing anything like someone just flipped a switch in his head. They are wired this way
And when they do turn good luck getting them outta the tank without tearing your rock work down. They are smart and paranoid, catching them is near impossible.
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.