Bromine Chemistry Question

[FormerBromineUser]

After adding 2C dichlor at dusk.
PM:
pH 7.4
C 0
TA 190
CH 90
CYA 0
AM: same except I got 180 for TA

[PoolDoc]

Add 6 cups tonlght.

[FormerBromineUser]

After adding 6C dichlor and waiting an hour:
PM:
FC: 5.4
CC: 0.8
pH: 8.0
TA 200
CH: 90
CYA: 0

AM: (I did not get up at dawn but the auto-cover was closed)
FC 5.0
CC: 0.8
pH: 7.4 (but if I let it sit for a while it rises to 8.0 so maybe that was issue last night?)
TA: 200
CH: 90
CYA: 0 (but the mixture looked cloudier than last night)

[Watermom]

Read the pH when you do the test instead of letting it sit. Also, no need to test the CYA so often or you will run out of reagents. Once per week while you are using dichlor is probably plenty often enough.

[FormerBromineUser]

Thanks! That helps. Now I just need to know what to do tonight! :-)

[PoolDoc]

After adding 6C dichlor and waiting an hour:

AM: (I did not get up at dawn but the auto-cover was closed)
FC 5.0
CC: 0.8
pH: 7.4 (but if I let it sit for a while it rises to 8.0 so maybe that was issue last night?)
TA: 200
CH: 90
CYA: 0 (but the mixture looked cloudier than last night)

Leave the cover off, if you can. And add some muriatic acid, to lower the pH.

Read these pages:

http://pool9.net/ma/ (Using muriatic acid safely)
http://pool9.net/alk-step/ (Step by step guide to lowering alkalinity)

[FormerBromineUser]

Will do, thanks. I was wondering if TA was next...! Should I just use the pool calculator for maintaining my FC for now, rather than bugging you about it? If so, I will continue using dichlor until I get a CYA reading (unless you tell me otherwise).

[PoolDoc]

Really, what I want is for you to sort of keep it in your head. That sounds a bit hard, and probably is, right now. But you'll get use to it, and doing so will make things easier.

As far as chlorine goes, 10% of your CYA will keep you algae-free. You can go lower, if the pool has no sign of algae.

Use the poolcalculator as needed, but "use" it, instead of letting it "use" you.

[FormerBromineUser]

Thanks for the reply although I don't know what you want me to keep in my head. Figuring out the amount of dichlor or bleach I should add?
Anyway, I went to Leslie's to get more MA (they are cheaper than anywhere around here believe it or not: $11.79/2G of 31.45%) and took in a water sample. They have the same pH and FC numbers as I do but again we differed on TA (I said 200, they said 170) and CH (I said 90, they said 150). You said you liked to see comparison numbers, so there you go.
I added 3/4G of MA to aim for pH 7.0 (I am going to use my OTO for ph because it goes to 6.8 vs the K2006) I will check pH in 4 hours and add more MA if needed. When the pH gets down, I will aerate by 2 fountains and the step spa-jets.