I would recommend increasing the CYA to at least 60 ppm. This is because of the instantaneous high chlorine production at the cell, which would be used up faster before it got into the body of the pool. This is regardless of running hours of the cell.

With the higher CYA level you will have more options in the power level settings available to you.

I have been able to run at low CYA levels, but only in the offseason in Central Florinda, but has to be raised when spring and summer are there.

BTW the pool tech's information was incorrect, in that he is not fully conversant with SWCG operation. I find this the norm these days.

Hope this helps.

Pat