So, I'm on day 5 of managing my new fill and it's going well thanks to TFP. My latest question has to do with my sand filter...
The day I set up my Intex 1600 and backwashed it, the water wasn't really dirty in my view bubble, which seemed odd to me since it was my first backwash; just a little cloudy.
So today I noticed that my pressure creeped up to about 7, and after consulting my instruction DVD that came with my filter, it said backwash when pressure gets to 7-10. So I just backwashed, (still not really dirty) and it's back down to 5 (which is the same pressure as day 1). The DVD indicated that 5 was normal pressure to return to after a backwash.
-Why doesn't it return to 0 after backwashing?
-Is the fact that my sand isn't really dirty indicative of anything going wrong? Like, is it not cleaning like it should? Maybe I'm expecting too much of my little sand filter?