First pool, might be our LAST...name says it all!

[aylad]

Now that you're getting very little brownish stuff on your filter, I believe you can go ahead and shock your pool.

You need to understand that high chlorine levels along with high pH levels will cause the metals to turn your water brown again if there's not enough sequestrant. So...you need to keep your pH on the low side--7.2 is ideal. I would go ahead and add your bleach, starting with what you have been adding to target about 5 ppm. If the water stays clear for another hour or so after that, add some more, maybe enough to go up by another 3 ppm. If it still stays clear, then go on up to 12 ppm. That is shock level, assuming you have less than 20 ppm of CYA in the water. If you can get it to 12 ppm, then you want to hold it there until you're losing less than 1 ppm of chlorine when testing after the sun is off the pool and again before the sun hits the pool in the morning. This, combined with 24/7 filtering with frequent washing of cartridges, should clear your pool up the rest of the way. I would add your chlorine at or just in front of the skimmer, so that if it's going to cause the iron to fall out, hopefully it will do so on your filter so it can be washed out and removed. If at any time during the raising of the chlorine the water starts to turn brown again, add another dose of metal sequestrant.

I want to reiterate that I'm NOT the resident metals expert, but from all the reading I've done of Mbar and Pooldoc's post, this is the route I would take with my own pool if I were in your shoes. I'll see if Ben can stop by and offer more useful information, but in the meantime, that's the plan of attack I would use.

Janet

[PoolDoc]

Sounds like Janet's got you covered, though I'd try to avoid more sequestrant if you can. Use it if you have to, but give it a chance to filter out first.

Regarding the goo, I don't know. One possibility: plasticizer (makes PVC flexible enough to be a liner) leaching out from your liner. High temps could accelerate that.

Ben

[swamp mistress]

oakie dokie, I've got your instructions printed out...will do.

[CarlD]

The sides of the Intex donuts are surprisingly tough as they are re-inforced. The bottom and the donut are weaker, more like a liner. I never saw any signs of the plastic breaking down on mine over 3 years.

[swamp mistress]

Thankfully the "goo" is disapearing, today there was almost nil on the skimmer.

7pm statis
flushed filter, added a total of 9 cups (72 oz) of bleach, (3 at first, tested, then 6 more)
without any problems...have not had to add metal control.
CL: 12 (if I understood shot glass method correctly, 1+1=2, 1+2=3, etc. did I do it right, after mixing pool water w/distilled, poured into test kit thingy, then added 5 drops & checked color...)
Ph: 7.2

8pm - checked again, same test results CL: 12, Ph: 7.2

will check early am & post results. The water is looking very good!

[CarlD]

Yup, you got the CarlD Patented Shot Glass Method down!

[swamp mistress]

6:30am results (6-way hth, 15' x 42' Intex)
CL: 12
Ph: 7.2

actions: flushed filter, (the water exiting the filter is only as dirty as the untreated tannin water going in from the hose), checked CYA sock, still has a little undisolved product in it, cleaned skimmer, VERY slight residue that washed off with the hose, didn't have to scrub it with degreaser! yahoo!!!! When I held up a glass of pool water, dare I say? it looked CRYSTAL! The pool water LOOKS so INVITING!

I didn't add more chlorine, didn't know how long to keep it at 12ppm...or let it fall back around 3-5 range?