What type and size pump do you use ?

Submersible or in-line ?
If you use a submersible,are you using one designed for 'dirty' water use?

What size....GPM / horsepower....for how many gallon system ?

Is there a desired water change (GPM) per hour for an aquaponic system ?


I know there isn't a 'set' answer....but I'm looking for some sugestions. Dont want to go too big (too much electric $)....dont want to be too small, not enough circulation

Thanks in advance