Are two-speed pumps worth it? HELP

[gwrace1]

I did the same research your doing when I had out AGP installed in early March. I have an SWG. The pool is 33' round with a 54" wall for a total of about 26000 gallons.

On low speed the pump consumes 3.8 amps at 120 volts. On high speed it consumes 10.8 Amps. It turns over an estimated 80 GPM on high and 35-40 GPM on low. I'm currently running the SWG for 12 hours each night with the SWG set on 40% with a CYA of 35-40 PPM and pump on low speed. I've noticed about a $35 jump in the monthly electrical bill since the install. The FC level holds consistently at 2.5 PPM and the water has been crystal clear since startup in early March. Water temps are running 85-95 degrees.

The high speed setting is nice when we want to run both the fountain and the pool skim or you want a really fast filtration cycle. We don't use a vacuam as I have a Pool Rover.

The pump is rated at 1.5 HP running with a 26" Pentair Sand Filter with Zeolite media.