frustrated...please read my newest posts, I had put incorrect numbers in,now see if it looks right
Testing question
- Thread starter skydiva44
- Start date
My advice didn't change - 
shock your pool with liquid chlorine to 24. First, lower the Ph to 7.2 with 3 cups of dry acid.
Use 1 lb bag of Dichlor shock to raise your CYA level.
Have the pool store test the salt and add if necessary.
Raise FC to shock level with liquid chlorine and maintain it until the FC holds overnight.
Once all is stable, and the the FC is holding/swg is operational, allow the FC to drop to normal levels and then you can slowly lower your TA by adding acid every time the PH rises to 7.8. Simply lower it back down to 7.2 with dry acid. Use the Pool Calc to determine your dosing.
shock your pool with liquid chlorine to 24. First, lower the Ph to 7.2 with 3 cups of dry acid.
Use 1 lb bag of Dichlor shock to raise your CYA level.
Have the pool store test the salt and add if necessary.
Raise FC to shock level with liquid chlorine and maintain it until the FC holds overnight.
Once all is stable, and the the FC is holding/swg is operational, allow the FC to drop to normal levels and then you can slowly lower your TA by adding acid every time the PH rises to 7.8. Simply lower it back down to 7.2 with dry acid. Use the Pool Calc to determine your dosing.
Thank you so much! I just figured out what the box that says shock means...haha...it's the level that I am at NOW, duh!
You should be able to find it in pool departments at Walmart, Home Depot, Lowes, Ace hardare. Pool stores will have it.
It might not be in 1 lb bags everywhere, it might be in 2 lb cannisters and marked for "spa" use
Look for the words
"sodium dichloro-s-triazinetrione" under active ingredients.
It might not be in 1 lb bags everywhere, it might be in 2 lb cannisters and marked for "spa" use
Look for the words
"sodium dichloro-s-triazinetrione" under active ingredients.
If one has confirmed Mustard Algae in their pool, that is their shock level. Killing Mustard Algae takes a higher level of shock because it is resistant to chlorine. Its only held that high for a short time, 1-2 days because any longer than that can fade a vinyl pool.
Thanks FPM.....I have my Ph between 7.5 and 7.2 right now, added the dry acid a couple of times to get it down from 7.8. Do you think it would be ok to add the bleach now or should I absolutely wait until it is completely down to 7.2?
Today's results
fc-5 tc-5 -0
ph - 7.5
cya -60
FAS-DPD- 26
SWG -
normal-5-9
shock-18
mustard algae-34
It is telling me I don't need to add anything but liquid stabilizer, is that also a household product or must I get it at the pool store?
I am still confused on the shock #, mine is 18 but according to the cya chart it should be 24 right? So more bleach to get it there?
CAN I SWIM in it today?
fc-5 tc-5 -0
ph - 7.5
cya -60
FAS-DPD- 26
SWG -
normal-5-9
shock-18
mustard algae-34
It is telling me I don't need to add anything but liquid stabilizer, is that also a household product or must I get it at the pool store?
I am still confused on the shock #, mine is 18 but according to the cya chart it should be 24 right? So more bleach to get it there?
CAN I SWIM in it today?
Adding to my above post from this morning
I have gone back to Pool school and re-read somethings. My FC-TC is 0, I need to get that back up correct? I have a 1lb bag of the shock, should I use that or the bleach to try and get my count back up. I am still so confused on all of this, but getting better I think..lol
I have gone back to Pool school and re-read somethings. My FC-TC is 0, I need to get that back up correct? I have a 1lb bag of the shock, should I use that or the bleach to try and get my count back up. I am still so confused on all of this, but getting better I think..lol
In the above post you state the FAS-DPD test was 26 this morning, and this afternoon it was 0?
If this is correct, then yes, raise it back up to 18, and hold it at 18 until it holds overnight. Use bleach, don't use the bag of shock.
If this is correct, then yes, raise it back up to 18, and hold it at 18 until it holds overnight. Use bleach, don't use the bag of shock.
ok...here is where I am confused...on the pool calculator the very first yellow box says FC, but I was told to put my cya and whatever the table says for shock level. But when I do my test with my kit there is the fc and tc and I got a 5 on both of those so it equals 0 correct? And that is CC correct? I guess I am not catching on yet So not sure which results are the most important...so sorry for all the bothersome questions, I just have to get it right once and I'll be good to go! lol I forgot to say my FAS-DPD is 26, I guess I just don't understand the difference
You have me confused. 
You have the oto chlorine test - put in 5 drops of titrant and the solution turns shades of yellow. In this test you are seing 5 because thats as high as the test can read.
Then you have the FAS-DPD test that is a vial that you fill to 10ml you add powder and the solution turns pink. On that test you are getting 26.
26 is your FC level, not 5.
FC + CC = TC. You said "FC is 5 and TC is 5 so that equals 0" No, not possible and you are just misunderstanding.
I wouldn't bother doing the yellow OTO test right now. It may serve a purpose in your daily pool care routine in the future, but it won't help you now and it's just confusing the situation.
Just use the FAS-DPD test.
Yes, you can use the recommended FC levels from the Pool Calculator, they differ slightly from the CYA chart. Either will work, the higher FC level on the chart will likely work faster.
So, if your FC is below 18, bump it back up with bleach. You may use 18 or 24, tis up to you.
Hope this helps clarify things.
You have the oto chlorine test - put in 5 drops of titrant and the solution turns shades of yellow. In this test you are seing 5 because thats as high as the test can read.
Then you have the FAS-DPD test that is a vial that you fill to 10ml you add powder and the solution turns pink. On that test you are getting 26.
26 is your FC level, not 5.
FC + CC = TC. You said "FC is 5 and TC is 5 so that equals 0" No, not possible and you are just misunderstanding.
I wouldn't bother doing the yellow OTO test right now. It may serve a purpose in your daily pool care routine in the future, but it won't help you now and it's just confusing the situation.
Just use the FAS-DPD test.
Yes, you can use the recommended FC levels from the Pool Calculator, they differ slightly from the CYA chart. Either will work, the higher FC level on the chart will likely work faster.
So, if your FC is below 18, bump it back up with bleach. You may use 18 or 24, tis up to you.
Hope this helps clarify things.
Thank you FPM..I just checked it again and the FAS-DPD is 24...gonna leave it alone with that....will check it again in the morning to see if is holding at that then turn my SWG on and JUMP IN tomorrow afternoon....it is safe to swim isn't it? lol
Make sure your pump/filter/swg are off when you swim. This is a safety issue from an electrical standpoint.
You can swim up to shock level safely.
You can swim up to shock level safely.
Ok here's my latest...
FAS-DPD 28
Cya -70
According to the PC my target should be 28 and that is where I am right now, but down in the other boxes where it says shock, it says 20...so which one is my shock level right now?
FAS-DPD 28
Cya -70
According to the PC my target should be 28 and that is where I am right now, but down in the other boxes where it says shock, it says 20...so which one is my shock level right now?
With CYA at 70 shock level is anywhere from 20 to 28. The higher you go the faster things clear up. But the lower end of the range will work. In any case, you are fine where you are right now.
I haven't followed the entire sequence, but from what I see: if you have added salt already, then you can turn on the SWG. If you haven't added salt already, you should give the salt 24 hours to mix in before turning on the SWG.