I have a Hayward DE 36 and my new 10k gallon pool was filled exactly one month ago. I haven't done any backwash yet because I was told to backwash only when the filter gauge displays a gain of 10 in pressure.
The pressure gauge has read 3 since the pool was filled, and it has only gone up maybe a hairline in 30 days.
I am currently running my ecostar pump at 1300 rpm for 16 hours a day. If I increase the pump's speed to 1800rpm the pressure goes up to 9, so I know the gauge is working.
The question is, am I ok in not backwashing not even once since pool was filled? At this rate it will take months for gauge to display a gain of 10 in pressure.