I have a 65 gallon breeder tank with under gravel filter run by Aqua clear powerheads. The power head design has been changed from the suction cup design to an over the rim hanger. The two problems are (a) the power head won't reach the top of the lift tubes from those hangers because of the tank's height (b) my tank has a rim on the inside of the top of the tank to hold the glass covers. Any ideas or recommendations?