pH above 8 15ft X 48in Intex

[PoolDoc]

Yeah, 15 ppm should be about right.

Regarding vacation, there are 3 possible options:

1. HiC2 => CYA > 100 ppm & FC > 20 ppm when leaving.
2. 3x doses of polyquat AND removing cartridge from filter OR bypassing sand filter (Polyquat tends to collect on the filter.)
3. Borates > 60 ppm (protects against green algae.)
4. Phosphates < 125 ppb (protects against both green and mustard algae)

Regardless, you want to be sure that your pool is very clean and algae free the week before AND that your filter is in good shape

[Pappy]

I can get Kem-Tek CYA and Clorox Polyquat 60 at the local Lowes for a kinda reasonable price. We already have several jugs of 8.25% bleach. I was thinking I'd get pool clean with bleach, then bring the cya up to 40 or so with the Kem-Tek, then, after that see what I need to do with the pH. Will it be a big problem if the pH is too high for another week or 2? How much CYA should I add to 4500 gallons at a time? I think I read wait a week between doses.

[PoolDoc]

"Clorox Polyquat 60" Clorox brand polyquat? Really? That's new.

Try to keep the pH between 7 & 8 at all times. Below 6.0, it can definitely damage your liner.

[Pappy]

http://www.lowes.com/pd_576066-1327-...ide&facetInfo=

Since I'm over 8 (unless 2" of rain lowers pH significantly) I have a little wiggle room on the lower side.

How much CYA should I add at a time?

[PoolDoc]

Very interesting -- thanks for the link. I had no idea they were doing that.

Keep in mind that Kem-Tek's product costs 35% less -- $17.99 vs $27.98 -- so if you buy ahead, you can save quite a bit.

[Pappy]

Is a quarter cup of 99% CYA a reasonable place to start if there is none in 4500 gallons? pH8+?

[PoolDoc]

CYA is about 2# / quart. 1 lb will add about 20 ppm to your pool.

So, no, that's not enough. Put about 2 cups in an old sock, and hang it in front of the return.