Just added the last two gallons of 10% chlorine and 1/3 box of borax tonight after the sun was off the pool. FC was just about zero before the addition. We added 2 gallons last night too and only got it up to 1.2ppm. This a.m. it was pretty much gone.

The water is clear but still Gatorade green, although a little lighter shade. Still have the spider-web like staining on the sides. Could algae be collecting in fine cracks in the plaster? Could this be mustard algae? I've been reading about it, hope we don't have it. And of course, still have the brown iron stains on the stairs. Except for the two white spots where I placed two halves of a vitamin C tablet.

I'm getting pretty frustrated here. My husband seems to think 1-2 gallons of 10% chlorine a day should be enough and is skeptical that we need more. With a CYA level of 90ppm we should be running 5-10ppm chlorine levels at a minimum for manintenence and it looks like we need at least 20-75 for shock levels I think. I have no idea how many gallons that would be for either level. Do we just keep dumping in gallon after gallon until it regesters 20+ppm? And how many would that be? 5 gallons, 10, 20? I want to have the right amount on hand but what is that amount?
Is there a calulator somewhere or a formula that we could plug in our pool gallons + CYA level+ ppm needed? I'm not that good at math, but if I have a formula and a calculator I could probably figure it out. Or is it just add until it's enough, and hold it there for a few days? I guess I want to know how many gallons to have on hand. I don't want to keep running to the store every other day.
My drop dead date of September 1st is fast approching and I've lost a week just waiting for the test kit.

With our CYA levels at 90ppm we would need to keep our Chlorine levels at least to 5ppm for everyday maintenence let alone shock levels. Is there any other method to reduce CYA other than dilution of the pool water? If we dumped 20% of the water would that bring it down to 70%? That wouold be a more manageable level of chlorine to me.

Anyway I'm getting really frustrated and confused at this point. And I haven't even talked about the metal issues.