I drilled
I did try it. It seemed to make more noise. I than got some advise from reef octopus; they suggested that I cover the hole with silicon, then slowly make the hole bigger. This has seemed to help; there is still a little more noise than I would like but I think this is what I am left with. Interestingly, as I covered the hole the water level decreased until it made a noise like a toilet flushing. As the hole got bigger, the water level increased until the water was 1/2 covering the round part of the r, this is were my tank is the quietist. I would suggest that you play with the hole size with some bluetac or tap (you could even use you finger). I used my finger to try it then I went with the silicon. Hope it helps!