I am mid shock process & now that my steps are sparkling clean, I noticed a very small amount of sand on 2 steps. When I say small amount, I mean less than a palm full scattered. No other sand noticed out of any of the other returns, nor any noticed in the Polaris filter. The filter seems to be working ok. Cloudy water noted in view glass when beginning backwashing & rinsing, then gets clear, like it should. I replaced the pressure gage yesterday & no significant increased pressure noted. Could this be the beginning of the laterals going bad, or some other problem?