i have 4 damsels in my tank that i want to get out but i can't seem to catch them with the net due to all my live rock in there. does anyone have any tips on how to get them out in a tank full of rock?
You could try a trap, but that could take a while and in my experience not all fish will go into a trap (though Damsels are usually pretty bold). Taking out the rock and catching the fish won't take as long as you'd think, and its a good chance to blow out any accumulated detritus in your rock work.
Thats probably not what you wanted to hear, maybe someone more creative will respond.
I trained mine to eat at the same spot in the corner of my tank. I fed them religiously with flake food at the same time everyday for about a week. Scooped em up like shooting fish in a barrel.
I've had really good luck with a clear trapdoor style fishtrap with live brine shrimp. I've used it a bunch of times in my 180 after making a few bad choices 8)