Can't STOP The ALGAE - Please Help

[cdogstu99]

Went on vacation a few weeks back and came back to a green pool.

Immediately brought up to shock (25 FC) and noticed that i was quickly losing chlorine and kept on it for a few days, when i thought that I was in the clear. But can't seem to get the green pool back to clear. Here are my current levels.

Note I've been using the Job Lot Pool Shock (12.5% hypo) as my chlorine/shock..not sure if that would matter.

Here are my current levels:

FC 5.5
CC 1
PH 7.5
TA 40
CH 40
CYA 100

Any advice?

 

[PoolGate]

Retest your CYA using the dilution test method. Add 50% tap water to your pool water sample, test as usual, then double the results.

 

[cdogstu99]

Thanks! Ok doing it that way I got a CYA of 60.

 

[Donldson]

doing it that way I got a CYA of 60.

As in you got a result of 60 so your CYA is actually 120, or that you got a result of 30 and your CYA is 60?

 

[cdogstu99]

nope it was 30 and doubled it...so 60

 

[RLP]

What are you testing with?
Please fill out your signature with as many details as possible. Create Your Signature - Further Reading

 

[cdogstu99]

Taylor K2005 Test Kit

 

[PoolGate]

Why was it originally 100?

 

[cdogstu99]

I'm going to go retest right now

 

[cdogstu99]

Re-reading with actual test kit of CYA is 80

Forgot to mention i did add some muriatic acid to the pool probably a week ago as the CYA was reading 10-20. Not sure if that threw it out of wack somehow

 

[RLP]

I believe that test kit only measures FC up to 5 ppm. How are you measuring 25 ppm FC?

 

[cdogstu99]

Sorry its K-2006 Kit, not sure if that makes a difference

 

[RLP]

It does. The K2006 will measure FC to much higher levels.

Re-reading with actual test kit of CYA is 80

Forgot to mention i did add some muriatic acid to the pool probably a week ago as the CYA was reading 10-20. Not sure if that threw it out of wack somehow

The addition of muriatic acid will not raise cya. Adding cyanuric acid (in liquid or granular form) will.

With a cya of 80, you need to raise your FC to 31 and maintain it there untill you pass the 3 parameters of slam. SLAM - Shock Level and Maintain

 

[RLP]

You might want to think about exchanging some water to lower cya.

 

[cdogstu99]

ok thanks i will do that now...

sorry should clarify i added muriatic acid to lower PH (sorry long day)

 

[RLP]

I hear you about the long day. Let us know if you have any more questions.

You'll want to stock up on liquid chlorine. Aka bleach, (with no additives.)

It will take a little effort,but the results will be worth it.

 

[RLP]

You are going to want to remove those steps and drain/clean the internals.

They will harbor algae that make it much more difficult to successfully complete the slam.

clean inside the skimmer. Anywhere water can go, algae will thrive.

Brush the pool frequently and keep an eye on the filter.

 

[cdogstu99]

I hear you about the long day. Let us know if you have any more questions.

You'll want to stock up on liquid chlorine. Aka bleach, (with no additives.)

It will take a little effort,but the results will be worth it.

Thank you. So, i have a lot of the Pool Shock that I buy at Ocean State Job Lot. I've used that forever. Should be equally as good as regular bleach i think right?

 

[Bperry]

Thank you. So, i have a lot of the Pool Shock that I buy at Ocean State Job Lot. I've used that forever. Should be equally as good as regular bleach i think right?

Even better than bleach.

 

[RLP]

Is it liquid? I did see that on its website. That will work. What % of sodium hypochlorite is it?

So sodium hypochlorite is the chemical name. It is also called liquid chlorine, chlorine, bleach, or liquid shock. Its all the same. It does come in different strengths. Household bleach is around 5%. hypochlorite is also available in 10%, and 12.5%, commonly used for pools.

Liquid Chlorine - Further Reading

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