I have a 90 gal tank with 4 maxijet 1200's on the back wall on a wavemaker. I got so frustrated with the suction cups not holding that I removed the brackets and tried to glue the powerheads to the glass with superglue gel. Unfortunately this only lasted one day and the glue failed. Now I can't even go back to the brackets because the groove on the back of the powerheads is full of glue. Any ideas to solve this problem? ( 2 of the powerheads are in the top corners and 2 had been about halfway down the back). Thanks for any ideas. Bob