I have seen people on here say that they have vacuumed to waste.
I have to dump some water because my CYA is a bit high and my calcium is around 480 so when I vacuum, I was thinking about lowering the water level that way increments at a time instead of all at once. It will take a few times but it would work but my question is how does the sand filter backwash? In other words, if I'm vacuuming, does the dust and dirt that I'm sucking up just go to the bottom side of the sand only to be blown back into the pool when I put the valve back on "filtration" or does the dirt bypass the sand and go directly out the drain hose?
I just don't want the dirt to re-enter the pool.
Does that make sense? I hope I'm explaining that right. I guess what I'm wondering is how the sand is backwashed? Normal filtration means the water is directed downward thru the sand but when backwashing, does it just reverse and flow upward and therefore will hold the dirt I'm trying to filter only to blow back when I go to filtration again?
Sheesh! Hard to explain but you know what I mean....