overflow hole for 3 ft tank

[derricklaj]

Hi

Any one advise of size of the overflow hole for a 3ftx2ftx2ft tank?

if i am having a sump of about 2 ftx1.5ftx.15ft what is the flow rate i should achieve? 3 to 5 times of main tank? is it to fast for the sump/refugium?

[hotsoup]

just make sure the hole to sump tank is bigger(25mm) than return(20mm). As for the flow, not to worry . u can control them using check valve

[Cleartank]

This might be of help?!

[ZeRoC00l]

may i know what is meant by minimum linear overflow size = 53 inches

thank you

[derricklaj]

Thanks bros..wonder where to get cheap values

[shieldk]

may i know what is meant by minimum linear overflow size = 53 inches

thank you

Let me try.

Let say your overflow box is |__| shape, | = 6 inches, __ = 12 inches.

Therefore linear overflow size = 6 + 6 + 12 = 24 inches only.

Hope it's correct, otherwise someone correct me please .