Combined Chlorine Issues

[aylad]

If your CYA is really zero, then Cl at 20 ppm is fine. See the best guess table stickied at the top of the Chlorine forum...

However, with a plaster pool if you want to go higher, you can.

Janet

[hobie0]

I should receive my new test kit this coming week.

Here are my current readings today. I have kept the pool at 30 PPM FC for the past week.

FC: 30
TC: 32
CC: 2
PH: 7.4
ALK: 100
CA: 320
CYA: 11

I'm still having chlorine loss at night. I really need some more advice on whether I should kick my FC level even higher or just keep maintaining a level of 30 PPM and waiting until I have no more chlorine loss.

I've kept the chlorine this high for 2 weeks now with no success on getting rid of CC.

Thanks again for any help

[Watermom]

How has your cya changed so much over the life of this thread --- 41, 30, 0, 11. (I'm not even sure how you could discern a reading of 11.)

Regardless of which number is right, a shock level of 30 is plenty high enough. Are you letting the cl level fall off during the day or sustaining it with frequent testing and frequent dosing with bleach?

I'm sure it seems as if this is never gonna end. We have had several posters this year with this same problem --- excessive chlorine demand and taking a ton of chlorine to finally rid the pool of CC and have FC hold overnight. But, it does finally get there. I hope you have been reading some of those other threads and get some hope for your pool when you read of another person's pool that has made it through. I'm sorry it is taking so long ................

[hobie0]

I'm using a Lamotte ColorQ tester currently. So, it is a digital reading. I'm not sure how accurate the CYA readings are. I'm pretty sure the zero was a false reading. But, I'm positive that I have lost CYA over the past month, because it was reading 40-50 all my testings before my CC trouble occurred.

I did order the Taylor kit recommended here, but I will not receive it for a few more days.

[Watermom]

Ok. Smart move. Post with your numbers when you get your kit. In the meantime, keep at it. Bleach, bleach, and more bleach.

[hobie0]

Received my Taylor K2006 Test Kit yesterday. My Lamotte Color Q was giving me false readings.

Chlorine Numbers with Taylor kit:
FC: 18
CC: 0

Chlorine Numbers with Lamotte Test Kit
FC: 15.5
CC: 3.0

I'm going to let the chlorine get back down to below 10 and then repost all my numbers with both kits for a comparison.

[Watermom]

OK. We'll take a look when you get current numbers. How ya like that kit?