fighting mustard algae

[Kateyru]

Ok, I think I've got the plan. Shock at higher levels till no visible algae and overnight chlorine loss is normal...just like regular shock process.
I wasn't sure it was possible to get rid of all the mustard algae since I can't get pool light out.
I think this will take awhile and lots of bleach. I added 4 jugs of bleach (182 oz. jugs) last night to get FC = 40. This morning at 8:30, FC = 33.
Off to Dollar General (best price on bleach there and at Costco, btw) to get lots of bleach...should have bought stock
Important question, would you swim in this, FC = 40? It is hot as hades in Alabama!!
Thanks so much!!!!!!!

[Kateyru]

At 12:30 pm, FC = 37 so I added 2 more jugs (182oz. each) of bleach then measured pH. I added 50 oz. of acid last night based on pH of 8 BEFORE I started mustard algae shock. The pH is currently over 8. Do I add more acid?
Thanks.

[PoolDoc]

You need to keep your chlorine high -- I haven't re-read the thread, so I don't know how high -- but you ALSO need to keep your pH in range. Add some acid, until it's below 7.8!

[Kateyru]

Okay. What about TA which was 48 on 7/31?
Thanks.

[PoolDoc]

TA is related to pH, but not the same: you can have hi TA and low pH, hi TA and hi pH, lo TA and lo pH, and lo TA and hi pH!

You need to lower your pH! Once you do, you need to re-test your TA. If your TA is excessively low, you'll need to add bicarbonate, and THEN probably lower pH some again.

[Kateyru]

I added muriatic acid when I was at home for lunch. Will re-check pH this afternoon and get it down < 7.8 then test TA. I'm continuing to shock at mustard algae level. Pool water seems to have gotten way out of whack...
thanks much!

[PoolDoc]

Did you sign up for the Pool Log? (I haven't matched email addresses with user names yet -- we'll do that in the next few days, and set up all the forms and spreadsheets.)

If not, you need to do so. (Did you get an email about it?)

[Kateyru]

Is the Log the same as Pool Chart Entry and Results forms or Pool History entry or logsheet? If so, those were set up and have some info. I will update if that's where my info needs to be. I have not received an email about the log.
thanks.

[Kateyru]

Help!!!!!!! I added 20 oz acid at 12:30 today to lower ph. Tested again at 5 and added another 6 oz. Per Pool Calculator, this should get my pH to 7.6. I was heading to store for more bleach (for mustard algae shock) and decided to test TA so I could pick up some baking soda too. I thought my TA was 48 on 7/31. I just tested (6pm) and TA is basically off the chart on the high side. I used K-2006 kit and tried using the regular test of filling tube to 25 ml. I quickly realized that I was putting in too many drops trying to turn water red so started off and used 10 ml sample. I quit after adding 22 drops of R-0009 and still hadn't turned sample red...it was green, then blue, then yellow and heading darker/to red but, YIKES, that is some high TA.
Do I lower pH to 7.2 and aerate pH to 7.6 then lower again???????

[PoolDoc]

I quit after adding 22 drops of R-0009 and still hadn't turned sample red...it was green, then blue, then yellow and heading darker/to red but, YIKES, that is some high TA.

Watch this video, and retest: http://www.youtube.com/watch?v=gmpS-...ature=youtu.be

The rest of the videos are here: http://www.poolforum.com/pf2/showthread.php?17157