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sumping a 6ft x 2 x 2

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I'd go with 2 45mm holes and stick in 1 1/4" bulkheads will give ideally 3400 lph flow each (you'd need 3 25mm bulkheads to prevent gargling) and a pump that will do around 3500 lph at 1-1.5m so most 5000lph pumps will turn it over 5 times an hr. Tank is just under 700 Litres so A 3x1.5x1.5' tank will be fine probably get away with smaller. You don't really need that amount of flow to maintain water quality but the extra flow will help stir up the substrate a lil and keep things a bit cleaner. For drilling the tank i'd drill the 2 top back corners of the tank.

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Thanks Roboat just wondering what u mean as u said u woulduse 2 1 1/4" bulkheads then u said 3 25mm bulkheads, so if i drill 2 outlets 1 inlet what size bulkkheads an what size pipes (supply x 2 to sump and return x 1 to tank) i have an 1800 lph power head to stir up the tank Cheers Steve

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