Need help in finding the right size pump and filter for my 18 x33 oval AG Pool.It game with a Jacuzzi 1.0 HP 2 Spd pump,and a Swimpro sand filter.The rate of the filter is 25 GPM/FT and the filter and backwash is 47 GPM,Holds 100 LBS of sand.The guy that installed the pool said I need a bigger sand filter that hold 200 lbs.said it would filter better for the size of the pump.Please can someone help me understand what the man is saying
thanks
Belinda