I'm so lost Chorine 0

[hilda]

My husband did the absorbic acid treatment to my pool a couple months ago. Everything was looking good. I tested my chemicals Monday here is the results.
4/23
FC 5.5
CC 6.5
CH 225
TA 90
PH 7.5
CYA 55

I though the CH was a little low so yesterday I added some clorox pool calcium hardness to raise it. I also added a gallon of bleach. Didn't check chemicals yesterday got side tracked. Just checked them right now. All my chlorine is gone I don't understand how it went down to zero. Can someone help me. Thanks
New numbers 4/25
FC O
CH 250
PH 7.5
TA 90
CYA 55

 

[Demegrad9]

You have extremely high combined chlorine (CC), what was CC on your 4/25 measurement?

High CC is indicative of the fact that your FC is reacting with something in the water, you possibly have a nascent algae bloom starting. If so, that's what's consuming your Free Chlorine

 

[hilda]

I didn't check for the combined chlorine I just assumed it would be 0 since the FC was 0 I'll go check it right now.

 

[hilda]

Ok just checked the CC is also 0.

I don't understand what would cause my numbers to go down to zero in a matter of a couple of days.

Temp is 72

 

[DeanP66]

How does the water look? Is it clear and sparkly, or is it dull, and (or) cloudy? You probably have an algae bloom beginning if the FC is getting eaten away so quickly.

By the way, with CYA at 55 (round up and call it 60), you should be targeting FC of 7-9 and never below 5. That's probably why something started growing in your pool.

 

[pabeader]

Don't forget, you lose 2-3 ppm Cl each day, just to the sun.

 

[hilda]

The water is clear and sparkly. I added some bleach will test again later today to see what is does. I guess depending on this results I will know if I need to slam is that correct.
Thank you all very much for all the help.

 

[DeanP66]

Yes, bring the FC up to 8 or so and run another set of tests a couple of hours later. We'll see if those CC's clear up a bit.