Ok so I am currently building a 1000 gallon pond demensions are 120X80X28 and I will be using 2000 watts of heaters to heat it and was wondering what I should use for filteration my plan was using 4 FX5s and a Cascade1500 all combined flows about 3000gph is this enough or should I add a 55 gallon sump also? WIth a 1000 gph return pump? 

And my stock will be a RTC, RTCXTSN, MArblePIM, albino channel cat, 3 claris cats, TSN, Lima, Silver arow, 3 florida gars and possibly some of my rays,


And my stock will be a RTC, RTCXTSN, MArblePIM, albino channel cat, 3 claris cats, TSN, Lima, Silver arow, 3 florida gars and possibly some of my rays,