*SIGH* Looks Like I Have da' Mustard

[Tom.B]

No, that's an indicator of algae. If you can, put a few tabs in the skimmer, which will raise the chlorine level in the filter, without raising it so much in the pool.

A few... Meaning three at once? Isn't that going to shoot my CYA thru the roof? With it currently at 60, I can keep a SHOCK level FC without breaking the bank or killing the liner.

Having a liner you're concerned about is an even better reason to try the phosphates. I probably should let you know I have entirely selfish reasons for wanting you to try phosphate removal: this is a perfect test case, for VALID use of phosphate removers:
=> You clearly have chlorine resistant algae -- the backwash is almost absolute confirmation of that.
=> You have a legit concern about 'mustard shock levels' of chlorine.
=> You're behaving predictably from our point of view and seem to testing reliably . . . so the 'data' we get from you is likely to be meaningful..

But . . . I really do hope it works. It would provide us a very useful additional tool with which to help people.

Why does this make me feel dirty? :-D

It the backwash REALLY a clear indicator? Wouldn't the regular brushing cause the algae to get caught in the filter and clog it up? Moreover, at the apparent "concentration" of it as it left the waste hose just have it be green anyway?

Chlorine level has only been high for two days. Define "chlorine resistant". Are we saying that removal is impossible with SHOCK levels of chlorine, and that because it's a liner pool, +SHOCK+ level are unrealistic and/or unobtainable?

I will have my phosphate remover in a few days, what is the plan? To get them to zero? Problematic only because of the municipal supply I have. In fact, evaporation this week already has me needing to add more in the next few days. **EDIT** Amazon just emailed and the expected date I will get the PO4 remover is TOMORROW! YAY!

I hope we can figure this out. How's your track record? ;-)