Please check my filter and pump calculations

[eljefe281]

There is approximatly 20' between my pool suction and the pump suction, so I will need to check the pump curve at 20' of head.

First, the parameter of interest is total system head, from the pump discharge all the way back to the pump suction. Your statement only considers "suction head".

Also, head is more complex than the straight run distance from point A to point B. A turn in the pipe (elbow) adds a significant amount of head relative to a straight piece of pipe of the same length. Also, there are valves, as well as equipment (filter, heater, etc.) which add resistance.

Calculating total system head is very difficult and imprecise. The consensus on this board is that, after all is said and done, your total system head will be between 45 feet and 65 feet.

Do the same thing you did before, using the upper and lower ends of that range. That will give you a better idea of what you need.