Still working this out

[Kooky98]

Hi all,
My numbers:
FC 3.5
CC 0
PH 7.5 down from 8
TA 150 down from 170
CYA 30 That black dot is tricky

This was the first day my chlorine seems in a decent range.
I put muriatic acid in yesterday (again) by using pool math calculator.
Question? When it days to add xoz by volume, I am adding x oz. Do I need to be calculating anything else. Such as multiplying my pool volume to something? I know it is a crazy question.
I added 5.8 oz MA on Saturday and 2.4 yesterday.

When should I add it again? BTW it rained last night.
Thank you! I am frustrated.

 

[CrystalRiver]

Pool Math does all the calculation for you. It knows your pool size because you entered that when you set up the pool. All you have to do is pour it in slowly in front of a return with the pump running.

You'll need to add acid again when your pH hits 8.

Bring your FC up to 6 now.

You mentioned difficulties getting your FC in range. Have you done an overnight chlorine loss test?

 

[zea3]

Your target range for FC is 4-6. It is best to try to stay at the top of the target range, so when you do your daily testing add enough chlorine according to poolmath to hit 6ppm. That would be 15 ounces of 10% strength liquid chlorine.
Once your pool volume is set in poolmath you shouldn't need to enter it again. Are you using the app or the old webpage version of poolmath?
For pH, when it hits 7.8 bring it back down to 7.0 Test pH & TA once a week to check levels. Always recheck levels 30 minutes after an adjustment to make sure you hit the target.
Test the CYA once a month. If you feel like you are losing chlorine too quickly and an OCLT rules out algae, you can raise CYA to 40.

 

[Kooky98]

Your target range for FC is 4-6. It is best to try to stay at the top of the target range, so when you do your daily testing add enough chlorine according to poolmath to hit 6ppm. That would be 15 ounces of 10% strength liquid chlorine.
Once your pool volume is set in poolmath you shouldn't need to enter it again. Are you using the app or the old webpage version of poolmath?
For pH, when it hits 7.8 bring it back down to 7.0 Test pH & TA once a week to check levels. Always recheck levels 30 minutes after an adjustment to make sure you hit the target.
Test the CYA once a month. If you feel like you are losing chlorine too quickly and an OCLT rules out algae, you can raise CYA to 40.

Thanks, I am using the app.
I have my pool volume set up, and my type of chlorine.

So, I have been waiting a few hours after adding the MA to see if correct (slow filter/pump). I have been lightly mixing my pool with the broom handle after adding.
Are you saying I should retest 30 minutes after, and add more?
Also, I am using 12.5 chlorine and have it calculated. If I put my target to 6pp I get a warning that it is outside range, I was using the recommended range ( see picture) .
I'm sorry to sound confused!

 

[mknauss]

If I put my target to 6pp I get a warning that it is outside range, I was using the recommended range ( see picture) .

What value do you have entered for CYA?

 

[Mdragger88]

Thanks, I am using the app.
I have my pool volume set up, and my type of chlorine.

So, I have been waiting a few hours after adding the MA to see if correct (slow filter/pump). I have been lightly mixing my pool with the broom handle after adding.
Are you saying I should retest 30 minutes after, and add more?
Also, I am using 12.5 chlorine and have it calculated. If I put my target to 6pp I get a warning that it is outside range, I was using the recommended range ( see picture) .
I'm sorry to sound confused!

U have to be sure the cya is accurate- if set to 30ppm it should not tell u 6ppm fc is out of range.

 

[Kooky98]

What value do you have entered for CYA?

That was my problem! I had typed 3 instead of 30.

 

[Kooky98]

U have to be sure the cya is accurate- if set to 30ppm it should not tell u 6ppm fc is out of range.

It was wrong. I fixed it and now it says to add 8.9 to reach 6pp.

I will do this now, I will retest in an hour.
When should I add the M.A.?

 

[Kooky98]

It was wrong. I fixed it and now it says to add 8.9 to reach 6pp.

I will do this now, I will retest in an hour.
When should I add the M.A.?

Pool Math does all the calculation for you. It knows your pool size because you entered that when you set up the pool. All you have to do is pour it in slowly in front of a return with the pump running.

You'll need to add acid again when your pH hits 8.

Bring your FC up to 6 now.

You mentioned difficulties getting your FC in range. Have you done an overnight chlorine loss test?

I will do that tonight. I'll add cl now, test again in an hour to make sure I'm good.
I will test tonight and in the morning and repost.
My PH is a little high, but
my TA is high, that's why I thought I need Muriatic acid.
FC 3.5
CC 0
PH 7.5 down from 8
TA 150 down from 170
CYA 30 That black dot is tricky
Thanks!

 

[zea3]

You can do your MA at any time. pH in the 7.0 to 7.8 range is fine, so you don't need to lower it yet. We only adjust TA when it causes pH to rise rapidly. If you find the pH is rising over 8.0 every couple of days then you will want to lower the TA some more. If pH is fairly stable you can leave TA where it is.

You can set poolmath to share data with TFP and then we can see your test results by hovering over your avatar.

 

[CrystalRiver]

Let the TA ride. You need to know what it is currently for calculating the acid additions to control your pH. Having a high TA means your pH will tend to rise faster. TA below 50 can cause foaming. For those with a plaster pool or salt water generator, they need to know TA to calculate CSI to protect their plaster and minimize scaling on the salt water generator plates. For those of us with simple, vinyl pools without salt water generators, we can pretty much ignore TA (except for using it to calculate acid additions as noted above).

Having a higher TA means your pH will tend to rise faster. That will cause you to add acid more often. With each acid addition, both pH and TA come down. Over time, your pool will find its TA happy place - where it wants to be. If you really want, you can force TA down by adding acid to lower pH to 7, then aerating to raise pH to 8 again, repeating until TA is lowered. I don't think it's worth forcing it unless you have a plaster/salt water generator and have scaling problems that you are trying to solve.

 

[Kooky98]

You can do your MA at any time. pH in the 7.0 to 7.8 range is fine, so you don't need to lower it yet. We only adjust TA when it causes pH to rise rapidly. If you find the pH is rising over 8.0 every couple of days then you will want to lower the TA some more. If pH is fairly stable you can leave TA where it is.

You can set poolmath to share data with TFP and then we can see your test results by hovering over your avatar.

I will try that next time. Thanks!
So once my Chlorine is in the right range, we are good to go finally!

 

[Kooky98]

Let the TA ride. You need to know what it is currently for calculating the acid additions to control your pH. Having a high TA means your pH will tend to rise faster. TA below 50 can cause foaming. For those with a plaster pool or salt water generator, they need to know TA to calculate CSI to protect their plaster and minimize scaling on the salt water generator plates. For those of us with simple, vinyl pools without salt water generators, we can pretty much ignore TA (except for using it to calculate acid additions as noted above).

Having a higher TA means your pH will tend to rise faster. That will cause you to add acid more often. With each acid addition, both pH and TA come down. Over time, your pool will find its TA happy place - where it wants to be. If you really want, you can force TA down by adding acid to lower pH to 7, then aerating to raise pH to 8 again, repeating until TA is lowered. I don't think it's worth forcing it unless you have a plaster/salt water generator and have scaling problems that you are trying to solve.

Thanks!
Last year (my first) I lost weeks due to algae. Trying to be ahead and on top of it this year.