I just set up my 2ft. I calculated is around 95l. Im using compact 3000. The flow was crazy. I have to use the lowest setting. Even at lowest setting output, i got alot of bubble, splashing and noise at the first compartment of the sump coming from the drain pipe. Now still looking for solution to reduce the bubble and splashing. The return pump was recommend by the tank maker.
Wondering why the need to use up to 3000l/h.