We have a small pool in our home owner's association. We have a pool maintenance person who I trust to keep the pool safe enough to pass yearly health department checks but I don't trust him to know this:
During the winter we turn off the heat and cut the pump/DE filter time down to four hours a day. A couple inches of rain requires that we back flush the pool so that it doesn't overflow into the adjoining spa that we are heating.
My question is should I be adding DE every time I back flush the pool? During a wet winter I might be back flushing 10 times. Does it hurt the filter grids inside the filter if they do not have DE on them while the pump is pushing water through them?
\\Samson