After my last post, I have checked more details of my pump system. I found out the 2.5 HP is way higher than what I need.
My system:
1. Pool size: 20k Gallon, 2 bottom drain, 2 skimmer, 1 cleaner
2. Spa: 5 nozzles
3. SWG: Hayward T15
4. Filter: Pentair DE 60
5. Heater: one heater
6. Automation...