hi guys, i'm hard plumbing an above ground pool 18'X24'X52" and need to know should I use 1 1/2" or 2" pvc. I have a 2 hp 2 speed Waterway pump, Hayword EC40ac DE filter, Proline inline chlorinator, Raypac 181,000 BTU heater, and what size return eyeball should I use. The pipe run will be about...