Baffles in Sump

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Simple answer, more is better, but is it required? Tradionally you see three because that's enough.

Main purpose of the baffles is to keep bubbles created by the drains and skimmer away from the return pump intake. You got lots of variables here, sump design or layout, is your ref return by-passing baffles, flow, position of drains, using bubble towers and socks, height, spacing and depth of baffles, size of pump section, etc.