Are you planning on having one overflow on that tank? I have a 150 gallon and I have 2 corner overflows. I have 2 overflow boxes with 1 1/4" PVC
Durso intakes that reduce to 1" at the bulkhead. It flows plenty for my tank (about 600 gph
through the sump) You don't want to just have an overflow. It will be really loud.
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