Seems to be about time to replace my pump. Should I consider a variable speed as a viable option? As you can see from my signature, I think that my filter is oversized and that my pump at 2.5 HP is sized so that the in floor cleaning works correctly. The pump is run off an intermatic timer, but I am assuming that if I went to a variable speed that pump that control would transfer to the onboard pump controller. Would I actually gain any efficiency with a variable speed pump since I would guess that the in floor cleaning would have to run at maximum or near maximum pump speed in order to work correctly. The in floor cleaning seems to work very well as is and is useful in quick mixing when adding liquid chlorine and muriatic. Have had no problems with the water side of the 15 year old heater except having to replace water header O-ring for a leak and when I had the header off I did not notice any sign of excessive flow or scaling in the heat exchanger. If a variable speed is a viable option do you have any recommendations as to brand/size for reliablility ease of service?