Aquarium Top Off Suction Mount
thingiverse
A mount for a top off used in the link below. Rather then drilling a hole, you could use a suction mount. http://www.ebay.com/itm/201486489425?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Download Model from thingiverse
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