adjust cya before or after shocking

[BigDave]

I'm sorry if that sounded dissmissive - not intentional.
As far as the pump, it depends. Are you planning to dose the dichlor into the skimmer and let it dissolve on top of the sand? How often and for how long do you run it on timer? Could you divide the run time into two or three periods a day?
When you have a chance run the FC CC pH and TA so we can see where we are.
Use up the dichlor you have on hand to maintain FC. When it's gone, put on the SWCG, wait a few days and test CYA then figure the plan to bring your CYA up to desired level using Granular CYA.

[Kateyru]

No apologies needed, you didn't sound dismissive...I just know I'll need a little more handholding.
I must have been testing while you were posting. Results are FC = 4.5 (sunny day), pH = 7.3, TA = 80 (bright pink color, I wouldn't call it red)
Dissolve on top of sand??? not sure what that means...dose the dichlor in the skimmer basket at the pump versus in skimmer at the pool? Wherever I put it, does all go in at one time?
I run the timer about 8 hours a day. It would be somewhat difficult to divide the run time for the next couple of days (due to work schedule).
re: sock for granular cya...a real sock or is there a pool sock?

[BigDave]

When the TA test changes (in one or two drops) from green to Red / intense pink you're there. 80 sounds pretty good.
I meant puttng it in the pool skimmer - it then goes through the pipe, through the pump then onto the sand. As far "as all at once" - slowly into the skimmer, you don't want a big chunk to clog your pipes or pump.
if you've only one run period a day, best to add the dichlor at the beginning of the pump run. I wouldn't pour it in the skimmer if the pump is not running and neither should you.
I've used a nylon stocking doubled over - some people use tube socks.
So... FC 4.5 on a sunny day - loss of 2.5 today. Another 2.5 puts you below your minimum. I'd dose with a pound of dichlor. You'll need to add Borax after that to lift pH.

[Kateyru]

Ok, I'll put in a lb. of dichlor 1st thing tomorrow morning then check FC and pH later in the day.
thanks.

[Kateyru]

I have a question. I'm at the point where I am adding CYA (granular) to pool water. It's in a stocking and hanging in front of a return as of late yesterday afternoon. Do I need to run the filter/pump 24/7 while CYA dissolves or just run the usual 8 hours? Btw, water is looking good, and FC = 5 and pH = 7.6 per most recent test.
Thanks.

[BigDave]

Hey, happy to hear from you, I'd been wondering how the algea battle finished up. Glad to hear it's looking good.
Run your pump on it's regular schedule. Give the sock a squeeze now and again to help it along.

[Kateyru]

Good, glad I can cut back on pump time, and I'll squeeze prn. Many thanks again for all the help!!

[Kateyru]

Well, I'm back with another question...I just tested (5:45 pm) and got FC = 11.5 and pH = 7.6 (holding steady). My FC is up from 5 in 48 hours. I added salt and may have gotten a little heavy-handed. Hayward recs 2700-3400 and I'm at 3900. I'd set SWG at 45%. Is the FC up because of too much salt or is % too high? Other thoughts?
Thanks.

[BigDave]

I don't know if extra salt makes extra chlorine - I doubt it, but if your chlorine is climbing, you may want to consider reducing the on time of the salt cell or the % on the salt cell.

[PoolDoc]

I just tested (5:45 pm) and got FC = 11.5 and pH = 7.6 (holding steady). My FC is up from 5 in 48 hours. I added salt and may have gotten a little heavy-handed. Hayward recs 2700-3400 and I'm at 3900. I'd set SWG at 45%. Is the FC up because of too much salt or is % too high? Other thoughts?

I don't think the salt is a problem. But, what is your CYA level, and how are you testing. I saw mention of an OTO kit; do you have a K2006 yet?

FC = 10+ is too high, if your CYA is below 40 ppm, unless you are having algae problems.