Nevermind, I forgot you said the 1250. I have one of those already for a return pump. I don't know... it's a pretty big pump to be hanging from a Remora.
I'm running a Mag5 on a Remora Pro ....some bubbles, but production is very good. Not really impressed with Remora construction quality control ...but save that for another day : )
PS - don't put anything in the outflow to catch bubbles ...it pushes the water level up and greatly decreases production.