river-wear,


If you have a single pump running the pool, spa and polaris, then you will probably need something closer to 2 HP. However, as Carl pointed out you do not want to exceed your filter rating.

If you can give us some more details, we might be able to help better. Things that influence pump size are:

Spa and # jets, are jets on their own pump or shared with pool?
Polaris with or without booster pump?
Pipe diameter/lengths?
Current filter size and PSI?
Current pump HP and service factor?

Poolplaza has one of the best tutorial sites out there for pumps:

http://poolplaza.com/pool-pump-sizing-2.shtml