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OK, don't want to highjack this thread but...I want to also put a
1 1/2" bulkhead (four to be exact) in the back wall of my 54 corner tank and I've never drilled glass and scared.
also, will my tank wall hold four holes? two in the top for horizontal overflow and two near the bottom for CL.
2 3/8" is a big hole to put into a glass tank!!!!!!!!
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