75 gallon setup reef ready

[lstmysock11]

Looking to find out for a 75 gallon reef tank with a 20 gallon sump the right size DC pump I should use. Believe been looking at the reef ocopus pumps because can control them with reef-pi. The main drain in the tank is 1 inch and the emergency drain is 3/4 and the return was plumbed 3/4 also. Yes this was a used tank and I did not get a return pump with the setup. Looking for corals things like Zoa and for fish clowns, Scopas tang, Lawnmower goby and so on.

 

[New&no clue]

I have a similar tank, with mixed corals. My pump is rated for 1050GPH

 

[piranhaman00]

Jebao 4000.