I have not kept fronts, but of my tangs, my eels, tropheus, kilesa, all 3 goby pairs, and my shelldwellers would come right to the surface at feeding time. I even had a couple jump out of the tank at feeding time. That's when I do my fish catching.
Thanks a lot for the kind replies Friends - also wanted to know if its safe to completely drain the tank ? I mean can it harm or break the braces or cause the tank to leak ?
I wouldn't drain the tank. If you're dead set on removing fish,try netting them, try the traps, then come to the realization you need to remove rocks. If your tank is the same as it was before this shoudn't be much of a chore for you. You only have a few caves. Simply remove the rocks that fish can hide under and then use the Two Net Herd and Capture method Coler described.