chlorine disapearing

Don't swim in it until the shocking process is over and you've let the chlorine drift back down to the 8-15 mark. At that point, chlorine at 8-15 with CYA over 100 has no more ill effects than chlorine of 1-3 with no CYA.

Janet

I added 8 gallons last night . I think I saw a dillution recipe.. so I can use my test kit that only goes to 5 FC......Until I can get a new one

Use steam distilled water. I like a shot glass: one glass of distilled to one glass of pool water. Mix and test. Now if it reads "5" it's really 10.
Or use 2 glasses of distilled to one of pool: Now when it reads "5" it's 15.
3 glasses distilled: 20.

But it gets less accurate.

Or, if the water is much, MUCH darker yellow, it's probably well over 10. When it's orange I THINK it's around 20, and brown, around 30-35...but I am not certain.

Carl

Well a week later back too hardly any chlorine having to add 1 gallon of bleach a day ... CYA seemed to drop some to just under 100 . So shocked this morning with 8 gallons.....I got the drop test kit now which is alittle more difficult to use

Post a complete set of current numbers since it has been awhile. Also remind us of the type of pool, volume, type of filter. How does the water look?

!8k gallons , IG gunite,, DE filter ,water is good, CYA 100 FC 7.0 CC 0.5 PH 7.6 ALK 110......... having to add 1 gal. bleach a day...

In the evenings when you test and before you add bleach, how low has your chlorine dropped? Are you able to go from sundown one day until sunup the next day without losing more than 1ppm of chlorine?

One other thing you may not know. If you get a CYA reading of 100, it actually could be much higher than 100 since the test kit can't differentiate past that level. You need to be keeping your chlorine between 8-15 ALL the time. Since yours has dropped below that range, you could have an algae bloom that is trying to start. I think it might be wise for you to go ahead and shock your pool up to 25 and maybe squash any algae bloom that may be trying to start.

It was down to FC4 .05 CC this morning , from 7 yesterday so I took it to 20 before I left for work....

So is the plan that by shocking it enough , eventually it will retain FC ..I am getting tired of hauling all this bleach

Yes, that is the plan. But, the key is that you have to maintain the high cl reading as best as you can. Every morning, add enough bleach to shock it back up to 25. Do the same in the evening. If you are home in the afternoon, shock it back up. The more often and consistently you do it, the faster you'll get past this. You have to continue shocking until you can pass the overnight test without losing more than 1ppm if cl.

Do you have any place that sells liquid chlorine? Some stores sell 10 or 12.5% sodium hypochlorite. That is the same stuff as bleach, but higher percentage so you can use less to shock with. it will likely be more costly than bleach, though.

Did you ever get a good kit?