Metal in the water (Fiberglass 35K pool)

[mbar]

So sorry to hear of the trouble you are having. Can you post your numbers so that maybe I can see something that would make sense as to why the sequestering agent isn't keeping the metals in suspension after they are lifted from the pool. Having the cloudy water really seemed to be that the metals went into suspension. Is there something that could be putting more metal into your pool? Do you have copper pipes? I am just trying to figure out what is going on. Your clacium level is not high - so it can't be that - and the ascorbic acid is taking the stain off - so something is either putting more metal in the water, or the sequestering agent isn't working, maybe there isn't enough in the water - You may have to add more - if you had a lot of stain, maybe there was just too much metal for the amount of sequesterer you put in. I would take the ph down to 7, add more sequestering agent and see if the stains get lighter.

[blk133]

Guys,

I am back to step 1, Stain is even worse than it was before. Floor and walls are covered with this brownish/yellowish layer. Looks very dirty. As soon as I drop vitamin C it disappears around the vitamin.

I went to the local pool store (Leslies) guys checked the water for metal and said 0 metal in the water. He couldn't even sell anything to me just said that my numbers are perfect.

Chlorine 4ppm
Total Chlorine 4ppm
PH 7.2
Alk 80-90
Cal 120-130
CYA 30

We had a heavy rain here and maybe that caused it to stain even more than it used to be.

I don't have anything in the pool that could cause it to stain. Pool heater is Aquacal h155 that has a titanium heat exchanger, filter Hayward DE EC-75 and polaris 380.

All pipes are PVC.