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I have no idea. I have never drilled a tank. Both tanks are all-glass brand I believe. Not sure if they can be drilled.
CPR's are expensive. It might almost be cheaper to buy a tank I want drilled! I am trying to avoid plugging a bunch of extra electricity in!
So I have a couple non drilled tanks I might want to use for my sump/refugium room. Does anyone have a reccomendation for the cheapest place to...