Thank you very much for the info. My pump/tank set-up is pretty straight forward. Two lines coming up from the pool, into a jandy 3-way valve. One from the skimmers, one from the bottom drain. Discharge from pump straight to tank, then tank discharged back to pool with a 1" line coming off for the booster polaris pump. The piping is all 2" on the inlet, but I believe it goes down to 1.5" on the discharge to the tank. Tank discharge I think goes back to 2" at the ground level where it goes directly to the return jets.

I installed the complete pump/tank combo a few years ago myself along with the electrical components so I'm pretty competent in that area.

Thanks for all your advice. I'm definitely thinking about the dual speed. What is your opinion on going back to DE as opposed to sand? I don't mind the extra work if it means my water stays clearer.