Cya 80 and mustard algae

Aug 4, 2016
5
Mobile, AL
Pool Size
22000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
I am trying hard to learn how to care for my pool without the pool store. I’ve already dealt with copper staining this spring and now it’s mustard algae. I was trying to figure out just how long and what percentage to run my swg to keep my chlorine right. Unfortunately, I didn’t learn in time. I have a cya of 80 and I’m wondering just how high my chlorine needs to be to kill it. I have the Taylor k-2005 salt. The recommended chlorine test kit is coming today. From what I’ve read it’s going to take a lot of liquid chlorine to kill this algae. Would it be best to drain some water first? I see yellow out is not a recommended product.
 
Most everyone that comes to TFP thinking they have mustard algae, actually don't.

If you do have algae, the first step is SLAM (Shock Level and Maintain) - SLAM - Shock Level and Maintain

Post up a full set of test results once you have the FAS DPD test and the group can help you from there. I bet a good old fashioned SLAM will do you right, but it'll be tricky at CYA 80. You might need to drain and replace a bit of water first, to make the SLAM easier and cheaper.
 
I am trying hard to learn how to care for my pool without the pool store. I’ve already dealt with copper staining this spring and now it’s mustard algae. I was trying to figure out just how long and what percentage to run my swg to keep my chlorine right. Unfortunately, I didn’t learn in time. I have a cya of 80 and I’m wondering just how high my chlorine needs to be to kill it. I have the Taylor k-2005 salt. The recommended chlorine test kit is coming today. From what I’ve read it’s going to take a lot of liquid chlorine to kill this algae. Would it be best to drain some water first? I see yellow out is not a recommended product.
Welcome to TFP!!! :shark:

There are people that are successful with a CYA of 80, but it is hard and will take a lot of chlorine.

Given my experience, it would be best to exchange 25% of your water and get your CYA down to 60. You will likely be more successful.

Read "No Drain Water Exchange" in this article:

The get ready to SLAM the pool:

When you are done with slam, then you can tackle the mustard algae.
 
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Since you have a Taylor K2005 test kit, you need to add theTaylor K-1515 (FAS-DPD) test kit to be able to measure FC levels accurately and to SLAM Process. You also need aTatlor K-1766 salt test kit.

It may be more cost effective to just get the TF-Pro Salt.
TheTF-Pro Salt has the FAS-DPD and Salt tests included, along with the SmartStir.
 
Since you have a Taylor K2005 test kit, you need to add theTaylor K-1515 (FAS-DPD) test kit to be able to measure FC levels accurately and to SLAM Process. You also need aTatlor K-1766 salt test kit.

It may be more cost effective to just get the TF-Pro Salt.
TheTF-Pro Salt has the FAS-DPD and Salt tests included, along with the SmartStir.
I have the Taylor K2005 salt and I’m suppose to receive the FAS-DPD in the mail today.
 
Great!
Do you have a SmartStir or SpeedStir device?
It makes testing so much easier, more consistent and repeatable.
 
Fill out your signature more completely - including manufacturers and model numbers of all equipment and test kits.
 
Most everyone that comes to TFP thinking they have mustard algae, actually don't.

If you do have algae, the first step is SLAM (Shock Level and Maintain) - SLAM - Shock Level and Maintain

Post up a full set of test results once you have the FAS DPD test and the group can help you from there. I bet a good old fashioned SLAM will do you right, but it'll be tricky at CYA 80. You might need to drain and replace a bit of water first, to make the SLAM easier and cheaper.
So, I drained some water and added fresh. My cya is between 50-60. I read somewhere to round up, so 60. FC 8.5, CC0.5, PH7.2, TA70. I used the pool math and it says to add 4 gallons of 10% chlorine to raise chlorine to 24ppm.
Most everyone that comes to TFP thinking they have mustard algae, actually don't.

If you do have algae, the first step is SLAM (Shock Level and Maintain) - SLAM - Shock Level and Maintain

Post up a full set of test results once you have the FAS DPD test and the group can help you from there. I bet a good old fashioned SLAM will do you right, but it'll be tricky at CYA 80. You might need to drain and replace a bit of water first, to make the SLAM easier and cheaper.
 
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So, I drained some water and added fresh. My cya is between 50-60. I read somewhere to round up, so 60. FC 8.5, CC0.5, PH7.2, TA70. I used the pool math and it says to add 4 gallons of 10% chlorine to raise chlorine to 24ppm.
GREAT! Slam is a process. You need to follow the process. Print this out, read it three times and follow the process...Link-->SLAM Process

Test and replace FC to 24 as often as you can...until you reach all three criteria to end the SLAM.
 
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GREAT! Slam is a process. You need to follow the process. Print this out, read it three times and follow the process...Link-->SLAM Process

Test and replace FC to 24 as often as you can...until you reach all three criteria to end the SLAM.
When I try your link for SLAM it takes me to the home page. I did read it earlier today in pool school. I can’t get back to it for some reason🤷🏻‍♀️
 
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When I try your link for SLAM it takes me to the home page. I did read it earlier today in pool school. I can’t get back to it for some reason🤷🏻‍♀️
 
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