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My new tank has a center overflow with 5 predrilled holes. (2) 3/4" and (1) 1.5" inside the overflow and (2) 3/4"on each end of the eurobrace. I know the 1.5" is intended for the drain but I'm worried a single drain of that size might be noisy and I'll feel a lot better if I had an emergency drain too.
So I'm thinking of swapping the two, the 1.5" becomes the return and the two 3/4" becomes a herbie style drain. The question is, can a single 3/4" drain handle the flow for a 180g or am I stuck with a single drain setup?
So I'm thinking of swapping the two, the 1.5" becomes the return and the two 3/4" becomes a herbie style drain. The question is, can a single 3/4" drain handle the flow for a 180g or am I stuck with a single drain setup?