Quick question about my sand filter. Since I've had the pool, this will be my 2nd full season, my PSI on the filter never really goes up. It has the 2 marks for START and CLEAN. But the PSI never reaches the CLEAN mark, I still backwash occasionally but I'm wondering if this is ok.

In my mind I always thought that it probably just not that dirty to raise the PSI, because most of the debris that gets into my pool is larger so its caught by the skimmer basket and the basket right before the pump.

Just making sure I'm not crazy or if my line of thinking is correct.

Thanks!