Mustard algae

[Hotshot23]

Thoughts,
Did Slam process, removed mustard algae for a few weeks, got chlorine back down to 6ppm, cya 80, algae came back. Pushed chlorine back up to 20 ppm, algae gone. What is going on? I read that’s a sign of a lot of phosphates in pool.

Thanks,
Michael

 

[mknauss]

Read Mustard Algae - Trouble Free Pool

You need to follow the FC chart for Mustard Algae after completing the SLAM. Chlorine/CYA Chart

 

[Hotshot23]

Read Mustard Algae - Trouble Free Pool

You need to follow the FC chart for Mustard Algae after completing the SLAM. Chlorine/CYA Chart

Forever? Used to never run chlorine that high, and the chart for vinyl, swg pools on the site says 6ppm for cya of 80. I’m fine with 12 ppm but just want to understand what is going on? Thanks

 

[mknauss]

Did you follow the 24 hour mustard algae shock level at the end of the SLAM? Then it is best to stay above the mustard algae minimum for several days to a few weeks to be sure the mustard algae does not return. In the future, your FC should always stay on the high side of the Target Range if you are susceptible to mustard algae.

 

[Hotshot23]

Did you follow the 24 hour mustard algae shock level at the end of the SLAM? Then it is best to stay above the mustard algae minimum for several days to a few weeks to be sure the mustard algae does not return. In the future, your FC should always stay on the high side of the Target Range if you are susceptible to mustard algae.

Did you follow the 24 hour mustard algae shock level at the end of the SLAM? Then it is best to stay above the mustard algae minimum for several days to a few weeks to be sure the mustard algae does not return. In the future, your FC should always stay on the high side of the Target Range if you are susceptible to mustard algae.

I did the mustard algae shock at the end of the slam. So I though that you couldn’t test your ph above 10ppm? Thanks for your help.

 

[mknauss]

It is difficult to measure the pH when above 10ppm FC. Up to about 15 ppm FC as long as you read the pH test quickly (Seconds) it will be accurate.

Tough to do SLAM, etc at high CYA. Best to not let algae get in the system.

 

[Hotshot23]

It is difficult to measure the pH when above 10ppm FC. Up to about 15 ppm FC as long as you read the pH test quickly (Seconds) it will be accurate.

Tough to do SLAM, etc at high CYA. Best to not let algae get in the system.
ok, thanks, I had the cya at 30 ppm when I slammed, just raised it last weekend.