How to size return pump

[Pmj]

So I am definitely intrigued by this controllable dc pump idea. Jebao probably isn't gonna be the one I get as there seems to be to many red flags. Eheim doesn't have one unless I'm just special and can't find one. Does anyone have a controllable pump that they recommend? Other than the jebao?

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Others make DC pumps as well, like Ecotech. I have a Jebao DC pump and it works great. I do need to buy a spare though...

 

[Timfish]

. . . I do need to buy a spare though. . .

+1 (We should all have backup spares of any critical equipment)

 

[hkgar]

What is this calculator referring to when it asks pipe entrance/exits

I have one point of entrance into the pump and the return line splits to two exit point - one on each side of the DT