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bender18

What size bulk heads?

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hi all

I recently purchased a 3 tear setup that has 2 3x18x18 tanks with it.

And then i purchased a sump for it which is a 22.5x14.5x15 with a 3500lph aquaclear sump pump.

I was wondering what is bulk head would be best for this setup?

And what size holes will need to be drill for them?

Thanks in advance for you advice/ input

Cheers dave

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i have 25mm bulk heads in my 3 x 15 x 18 tanks, and the holes were drilled with a 32/35mm bit,

hope that helps,

most use 25mm unless its in tanks 6ft and over, then they sometimes use 40mm,

me personally i think 25mm for any tanks under 6ft is ok,

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