I have been dealing with a fine silt problem for about two weeks... my water chemistry is fine, but every morning I am going out to a pool with fine silt spread out on the bottom. I vacuum it up quite easily and haven't seen anything coming from the return until this morning. I turned off the pump just long enough to pull a few leaves from the pump basket. When I turned it back on, there was a brief but pretty dark plume of yukky water coming from the return. I backwashed and the water remained relatively clear for backwash water, I rinsed and returned to filter at which time the water from the return was very clear.
I have been reading up on Slime Bags, but my return fitting has a light in it and it will not accommodate one. I plan to change the return fitting at the end of the season as the light is no longer functional and I have installed an over-the-wall light fixture.
Is there anything I can install between my sand filter and the return fitting to take care of this problem? My next step was to open the sand filter and run a hose down into it to see if that makes a difference. My water is clean. I have been using Fiber Clear as an additive to my sand filter, is it possible that this is what is blowing back into my pool?