Return pump sizing question posed in the Q&A section

Great question!


Typically that depends on what your target flow through your sump would be.


Common return flow equation is based on what your skimmer can process, i.e. my skimmer can process +/- 450 GPH so that's my target flow for my return. The pump selection is based on the length of return lines, number of right angles, 45s, etc. and a great calculator can be found here. Intent is to feed the skimmer what it can process as well a calm steady flow through the fuge.


Most reefers rely on other means to get their tank turnover, i.e. closed loops. powerheads, etc. and the flow to the sump is for the heater, fuge and skimmer (fuge/skimmer if applicable).


Some prefer to maximize their return based on what their tank can handle, example 800 GPH through their returns. Nothing wrong with this and again would be based on the head loss calculator.


-Eric