This gonna sound crazy but mine have their own sound system , with 2 techniques and a microphone ta boot , amp and PA , I play alot of Electronic music, and classic stuff rock , classical , ect. Kinda like that guy fron the Cheech and Chong movie , I guess I always believed it too , treat them like you want to be treated , I believe they are sentient 1000% and believe this is a large part of my prolific growth / colors/ extension. But I also am a doser from Waaaaaay back I do the Redsea 4 part colors , Iodide in addition, manually dose everything , and also feed alot of varied food , polyp labs extender , and roids, also Reef energy A/B everyday with the skimmer off for a 6 hours period for nutrient uptake. I have a weird little system and it works for me and the coral , so Im cool with that. Who can ID the monti in the back right ?Since I am a firm believer that talking to plants makes them grow faster and have richer colors, I tried this with my corals and they have responded well. The fish seem to like it too. They also respond well to classical music I play when I am not at home. Much deeper colors and increased polyp extension.