Shock question for a small pool.

[CourtneyY5]

AnnaK: I did find that pool calculator, such a huge helper!

I made a mistake by scooping the CYA back out of the pool because it wasn't dissolving, but I added more today per the HTH (pool chemical company) recommendation.

My levels were

TH (total hardness) 100
FC- 1
PH 7.2
TA- 80
CYa-0

I've since used the pool calc and added soda ash and the CYA, and now my numbers are:

TH-200
FC-1
PH-7.8
TA-120
CYA-0 (just won't dissolve!)

I'm going to add bleach once I pick up a bottle from the store (my husband picked up the scented stuff).

What ppm should I be getting the FC to for a shock?

I notice that most on here get the FC to 5ppm and on all of information says that over 4 ppm there is risk of bodily injury.

Thanks so much for all of your help!

[Watermom]

How high to shock depends on how much cya (stabilizer) you have. Take a look at this table:

Stabilizer . . . . . . Min. FC . . . . Max FC . . . 'Shock' FC
=> 0 ppm . . . . . . . 1 ppm . . . . . 3 ppm . . . . 10 ppm
=> 10 - 20 ppm . . . . 2 ppm . . . . . 5 ppm . . . . 12 ppm
=> 30 - 50 ppm . . . . 3 ppm . . . . . 6 ppm . . . . 15 ppm
=> 60 - 90 ppm . . . . 5 ppm . . . . . 10 ppm . . .. 20 ppm
=> 100 - 200 ppm . . . 8 ppm . . . . . 15 ppm . . .. 25 ppm

So if you have no cya, then you want to maintain a cl reading between 1-3 all the time and when you need to shock, you take it up to 10ppm. Cya of 10-20, maintain cl level of 2-5 all the time and your shock level would be 12, etc.
By the way, as long as you are careful to never let your cl drop below the range required based on your cya level, you really don't need to shock unless the pool is really cloudy or something. Test every evening and add enough bleach to get back to your required level and you should be fine.

Having said that --- For about a week, until your cya starts registering, you may need to test and add bleach twice a day because without cya the chlorine doesn't last long. After about a week, testing once a day, preferably in the evening, should be adequate.

Cya takes a long time to dissolve -- like maybe up to a week. So don't test for it or add more for about a week or you risk ending up with more than you want in there.

Your ph and alk are fine right where they are. Hope this helps.