I've got some diamond coated hole saws for 1" and 1.5" bulkheads you can use.
I'll only offer to watch since I cracked 1 of the 3 holes that I drilled.
I have a 20 gallon tank i would like drilled incase I need it as a refugium. Anyone interested in drilling it, if you break it I won't be upset, it is just extra at this point.
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