Could this be algae or dirt/pollen?

[swimmy]

I am having a similar problem. I have shocked the pool and it stays free of yellowish brown powder which collects in the same spots of the liner each time until I turn on the filtration. (It poofs when swept and vaccuums easily). I have shocked and treated with yellow rid. The pool water is perfectly clear and the pool floor will stay clear for days UNTIL I turn the filtration system on. I too believe it is coming from jets. I have backwashed and rinsed and poured in the recommended amt. of filter cleaner. Could the filter sand need to be changed. If this residue is in the pipes how do I push it out?

[itstoohot]

We may be nearing the end of this thing. I've been keeping the CL at shock levels consistently for about 3-4 days now and vacuuming and cleaning cartridges religiously. One thing that I was forgetting was to brush (don't know how I missed that one), so I started that yesterday and what a difference today was. So little on the floor that I vacuumed again this morning and nothing has shown back up so far. I also replaced a ripped air relief screen in the filter. Not sure if that was contributing to any of the problem.

Anyway, for fun, here's our bleach container graveyard for the past few days -