Hello... I'm trying to do a DIY upflow scrubber similar to Santamonica's HOG units. I'm trying to attach some small stone on the back wall of the inside half "food container" using aquarium silicone, but it tends to peel off easily. I've tried to sand the plastic to rough it up a little also. Has anyone used a different epoxy or RTV that won't peel off so easily?
Thanks,
MR