I had the same problem with my Flame eating my coral. VERY EASY way to catch him....put his favorite coral that he is picking on in a pop bottle trap! Worked for me in 10 minutes!!!!!! (See my thread if you want to see a picture). Seriously.........it works!

Lights off with a RED LED light works real well for me.

I'd like to build one of those !

It's all acrylic except for the trap door, which is glass ? Got some rough dimensions ? The tube in the center, you hold onto it with that and the trap door with your other hand ?

Sorry, never used one before....

if i can catch him, can i have him? lol