All sounds reasonable for my first quick read through. I especially like the idea of having the suction for the closed loop in the bottom of the overflow. I saw this on Carpentersreef tank and I am doing this on my new 230g as well. I will just use a stand pipe for the drain to the sump and then the closed loop will be sucking in bubble free water.
Sounds good.
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No matter what the morrow brings, inventors keep inventing things.
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Jonathan
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www.cakerybakery.ca
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