Using a Nature 2 system with the BBB method

[tdkorson]

one cup of Borax did the trick. My PH up to about 7.7

Last night I added 4 bottles of bleach (1.42 gals per bottle) and now the chlorine OTO test shows off the scale high.

[Watermom]

I'm not sure how a cup of Borax in a 20K gallon pool raised the pH up from 6.8 to 7.7??? Maybe you meant one box. Or tester error or something, but oh well. As long as the pH is above 7.0, that is what is important.

Your 4 bottles of bleach would have added 17.2ppm of cl to the pool. Until your test kit arrives you can use a dilution method to test the water which is described here: Testing Without a Good Kit

[tdkorson]

I just found the report the pool place did A little over a week ago


0 s acid
40 alkalinity
7.1 ph
0 chloine
125 hardnesss


Since then I have added 4 lbs chlorine per evening
16lbs of baking soda to get started
And a cup of borax last night

I'll stop and get some stabalizer this evening

I'm not sure how a cup of Borax in a 20K gallon pool raised the pH up from 6.8 to 7.7??? Maybe you meant one box. Or tester error or something, but oh well.

--TESTER/cheap TEST KIT ERROR.

[tdkorson]

The pool is still cloudy. I can see the bottom of the shallow area, but not the deep end. I was not able to get stabilizer so my stabilizer is still 0, but I'm shocking at night.

1. How long should it take to clear up shocking nightly. It has been over a week already.
2. How much bleach should I add nightly?

[Watermom]

There is no way to know for sure how long it will take, but the more consistently you keep it at shock level, the faster it will go. How high are you taking the chlorine each evening? Test an hour after shocking tonight. Then, test again in the morning within 2 hours of sunup. See how much chlorine you lose. If it is more than 1ppm, then add enough bleach to get it back up to 15 or so. In a 20K gallon pool, each gallon (4 quarts) of 6% bleach will add about 3ppm of chlorine. Run your pump 24/7 and backwash when your filter pressure rises 5-10psi over clean filter pressure.

[rcy100]

I have a Duoclear system (one half of the unit is a SWCG, the other half is a Nature 2 cartridge). I was keeping the chlorine level around 1 per the instructions, but was suffering from brownish stains appearing on my pump and filter baskets and my return eyeballs. Last fall I yanked out the Nature 2 part, did an ascorbic acid treatment and removed the stains. So far (including the tail end of last season - maybe a couple of months) and almost three months this year, I have not had the stains return.

My suggestion - get rid of the Nature2 system (you don't have to do any plumbing, just pull the cartridge out and don't replace it) and run your chlorine at the recommended level relative to your CYA level.

[tdkorson]

This forum is sure right about the inability of pool places to test water. My kit doesn't get here till Monday. I was in town this morning and get the water tested at two different places. The first place used a strip and gave me readings of:
fc 10
ph 6.9
alkalinity 135
hardness 100
Stabilizer 35

On the same water the second place used another method and got:

fc 5
ph 7.4
alkalinity 130
hardness 30
Stabilizer 81

copper 1.0

The first place said I need to change my sand...

I can just barely see the deep end of the pool

I'll keep shocking every evening

[PoolDoc]

Nice set of comparisons - thanks!