fighting mustard algae

[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

[Kateyru]

THANKS!!!! That was really weirding me out!!!

[Kateyru]

Hi Team,
An update and questions...test results from earlier this morning are:
pH = 7.2
TA = 90
CYA = 35
FC has been drifting down since mustard algae shock attack. My estimate of FC is 15. I had to use dilution test as I am out of reagent to use with K-2206 test.

Questions:
1) is there a way/procedure to use fewer drops of R-0871 when repeatedly testing FC at mustard algae shock levels?
2) should I continue to lower TA (by adding acid to lower pH then aerating then repeating)
3) When should I add CYA to raise it? I've added several times this summer and am surprised it is as low as 35 but I triple- checked it today

I'm hoping that I have successfully removed the mustard algae but time will tell. No more extended trips away from home/pool should help.
thanks for your continued assistance!