Your pump says 8900 CI, if that is CI/Min then it is equal to 33 gallons/min dry or 38 gallons wet.
33 gallons X 60 minutes = 1980 GPH whoa.
This link is for a 950 GPH for 35 bucks, just ordered one.
http://cheaphydroponics.com/store/view-all/sunleaves-durapump-air-950gph/prod_500.html...