Cant hold chlorine

[aylad]

darn ,beat by Watermom by 5 minutes

Yeah, you gotta watch her, she's quick!

Janet

[CarlD]

Gets the jump on me all the time!

[herrmanncr]

OK, got test kit on order (K2006C). Meantime had pool store test at 3pm.
FC - 0.1
TC - 0.6
CC - 0.5
ALK (adjusted) - 117 (input) - 148 not sure the difference
PH - 7
Hardness - 377
CYA - 92
Sat index - -0.13 don't know if needed

5pm - added 1.5lbs Borax
830pm - added 4 - 1.42 gal bleach (5.68gal) 6% hypochlorite
Will check with strips and add 4 more before work WED morning if not holding. Test kit will take a couple of days so will drop sample off at store and have tested to get #s. Will post them once I have in hand. Again thanks and let me know if this is a good start or anything else to do. 21000 gal ingrnd vinyl.

[aylad]

This is a good start, but you're not going quite high enough with the chlorine to actually burn off the demand. You need to get to 20-25 ppm, since your CYA is so high. Since each gallon raises Cl by 3 ppm, that means you need 7-8 gallons in at first, then to add more at dark and in the morning to get back up to the 20-25 ppm. It will go faster if you can also test and re-add 2 or 3 times during the day.

Since your CYA is so high, you really need to consider draining and refilling about 1/2 your water, because even when you get the chlorine demand worked out, you're still going to have to maintain 8-15 ppm Cl at all times to keep the algae away.


Janet

[herrmanncr]

OK. Checked with strips this morning. FC looked to be about 3 ppm. Added 4 more jugs bleach. Dropped water sample off at pool store for test. Will do another test at 4pm. Will add 5-6 jugs tonight. Thanks.

[aylad]

Let us know how it's going!

Janet

[herrmanncr]

Got some results. At 4am this morning I took a water sample so I could drop off at pool store this morning. Also added 5.68 gal more of bleach. Results from this mornings sample after adding the 5.68 gal of bleach and 1.5lbs Borax last night are:
FC - 1.0
TC - 1.4
CC - 0.4
ALK (input) - 225
ALK (adjusted) - 205
PH - 7.4
CH - 400
CYA - 60
At 4pm today I took a new sample to have tested after adding the 5.68 gal bleach this morning and results are:
FC - 3.6
TC - 3.8
CC - 0.2
ALK (input) - 154
ALK(adjusted) - 130
CH - 292
CYA - 73
I could not believe it held chlrine today so at 5pm I took another sample to a different pool store and results are:
FC - 3.8
TC - 3.9
CC - 0.1
ALK (input) - 114
ALK (adjusted) - 82 what is the difference?
PH - 7.2
CH - 293
CYA - 96
Both stores use the PINPOINT water analysis system but ALK & CYA #s are way different. One store has me listed at 22000g & the other has me at 21000g. Could this be the difference? Also, when I told the "pool guy" I went to this sight for info and was using bleach he was impressed but said the bleach could ruin my liner. Should I be worried? Don't want to get my hopes up but looks like it held. Water is crystal and was 100* here today. Pool gets full sun from 11am to 6pm. What's my next step. Thanks again evderybody!!