I think I'm stuck. Setting up a new 18X33 AGP and looking at pumps/filters/ I see the Hayward 1 HP Powerflow Matrix pump (1592) and the 1.5 HP (1593). And then I see the Filters of the EC40 and EC50.
I was thinking for my 15,000 gallons, I would want to stick with a 1 hp pump, possibly the 2...