i have two that are well established in their homes and i all i have covering the tank is a jbj 48" light and 2 48" no covering my tank granted their in a 90 but have had them for over 6 months !! and never have they looked twice at cleaners ever !! i found that they love 1/2 small clam shells ya find on the beach i add a hand full every month and they continue to build up the entrance to their holes (mabe keeps them to busy to think about jumping hehehe) !! i have had them before and they jumped out (but my set up wasnt even close to what i have now
)) but with a nice bit of rock and no bullies messing with them or lights being shut off to fast they wont jump !! leave the 03
's on after main lights go off for about 1/2 hour and the jawfish cover the holes with a half of a shell and gone for the night !! the more shells the better for these guys they start working with them right away !! pretty cool !! just my experience having them jump and now they happy and no probs !!!