i dap an adhisive tevlon sheet to all openings...i run a bead of the dap on the rim, then place the precut sheet in place... works if i get all the spots...missed one spot, lost a ropefish...on my other tank i have not lost anything...first pick is the tank that it escaped from in the corner...the others are of my other tank with no escapes... to clean i remove the plexi glass top...hole is the feeding hole and it is far enough away from the side they can't get out...post your ways so we get a collection of way to pick a good one for our future tanks









