fighting mustard algae

[Kateyru]

Yes, I'll run SWG on regular schedule. My manual says CYA should be 60 to 80. So I should go ahead and add enough CYA NOW to get to 80 ppm? My husband will be at home but he is not overly helpful with the pool. If I go ahead and add CYA, the FC and pH should be tested everyday for several days? Hope I can convince him (the husband) to test...
Thanks.

[aylad]

Yes, go ahead and add whatever amount you need for your SWCG. The FC will definitely need to be tested (and adjusted if necessary) on a daily basis. The pH should be okay if he tests it every few days....

[Kateyru]

Thanks!

[Kateyru]

Hi Guys, I'm back home and pool looks good...not visible algae but high FC may be compensating. So, here are current results:
FC = 10.5
pH = 7.7
CYA = 50
TA = 90
I know that CYA needs to be higher. Do I lower pH and TA first or raise CYA?
SWG was running at 65% so have turned it down to 35% to lower FC. In the past, running it at 50% has kept FC steady.
Thanks!!!!

[aylad]

Leave pH and TA alone and add CYA.

Janet

[Kateyru]

Thanks so much!
Happy 4th!!!!!!!!!!

[BigDave]

I wouldn't drop the pH just yet, let it get closer to 8.0. When you do lower it, bring it down to 7.5/7.6. This will drop your TA. When the SWCG brings it back near 8.0, lower it again. You will be performing the TA reducing procedure but slowly.

Go ahead and bring up the CYA and good luck with the yellow algae.

[aylad]

Uhh, I just said that!!

Janet

[BigDave]

Yep, sorry. Me post real slow. OTOH I'm glad we're saying the same thing

[Kateyru]

Hi again,
I added CYA on 7/6. FC = 8 on 7/6 at 6:30 am and FC = 7 this morning and SWG has been off since yesterday morning. Slow drop with sufficient CYA, huh?
My pH = 7.7 today. I'm trying to let FC drift down to 5. Should I work on pH yet?
Mustard algae is still gone...yea!!!
Thank you, thank you!!