I recently purchased a regal angelfish (Red sea) from my LFS and I have noticed it is not eating in the water column. They said it was eating pellets well at the time of purchase. I have tried pellets, frozen mysis, frozen brine, frozen algae that contains sponges, nori and so far it seems less interested in eating. Any advice on what can help encourage it to eat? The tank is mature with live rock (have for about three years) with no aggressive tank mates (125gallon). Thanks for any advice.