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[chem geek]

If you are using a 25 ml sample size, you need to divide the number of drops by 5 (i.e. multiply by 0.2) to get FC and CC levels. If you are using a 10 ml sample size, you need to divide the number of drops by 2 (i.e. multiply by 0.5).

[connier13]

This morning after I ran the numbers, I went to the pool calculator and used it. I added 4 gallons of 6% bleach. My numbers right now are:

FC 15.5
CC 10
PH 7.2
TA 100
CH 360
CYA 55

Still cloudy as it has been since day 1 after shocking. Do I need to bring the FC to 20 and try holding it there?

[aylad]

Yes, with your CYA at 55 ppm, you need to bring FC to 20 and keep it there until you're not losing any chlorine overnight. How are you measuring the CC? Your FC+CC=TC, but there's no way to have a CC of 10 unless your pool is a total swamp....

Janet

[connier13]

I am using the 25ml water level. Today's reading was adding adding 31 drops to get pink water to change to clear for free chlorine. I then aded 5 drops of R0003, then I only had to add 2 drops of R0871 to get the water back clear.

[chem geek]

I am using the 25ml water level. Today's reading was adding adding 31 drops to get pink water to change to clear for free chlorine. I then aded 5 drops of R0003, then I only had to add 2 drops of R0871 to get the water back clear.

So that's 31*0.2 = 6.2 ppm FC and 2*0.2 = 0.4 ppm CC. Given the fairly rapid FC drop and the cloudiness, you need to bring the FC back up higher to shock level. Keep the filter running 24/7. Brush the sides of the pool to remove/expose any algae there.

[connier13]

I said that wrong, it was 31 drops using the 10ml...so 31*.5 was the 15.5 and 2*.5 was the 10 on cc....SORRY

I added 2 more gallons of bleach this afternoon and now my readings are:

20 FC
1.0 CC
7.4 PH
110 TA
380 CH
55 CYA

[connier13]

Reading this morning:

FC 11
CC 1
PH 7.2
TA 100
CH 380

No test for CYA, having to order more.

[aylad]

2*.5 was the 10 on cc....

2 * 0.5 = cc of 1, not 10--that makes a lot more sense. Get your chlorine back up to 20 ppm--if you let it continue to yo-yo up and down, it's not going to clear up. Consistency is the key!!

Also, you don't need to continue testing for CYA each time--that number shouldn't change unless you're doing a huge amount of draining/refilling, or using chlorine that contains stabilizer. Save the reagent unless you start using trichlor or dichlor (which I wouldn't, because your CYA will easily get out of control if you do).

Janet