You might loose slightly more per day to the sun at 30 rather than 40, but I'd really like to make sure you don't overshoot.
New Owner w/Test Results
- Thread starter rgswff
- Start date
Tested this morning:
pH - 7.8
FC - 7.5
CC - .5
Did I raise my FC too high? I tested yesterday evening and it was at 2.5. I added a gallon of bleach and it should have raised it to 6 but this morning it was at 7.5. I don't think I'm off that much on size of pool (it is a 19'x37' free form that goes from 3.5' to 7') What does a consistent CC of .5 mean? Should I be concerned?
pH - 7.8
FC - 7.5
CC - .5
Did I raise my FC too high? I tested yesterday evening and it was at 2.5. I added a gallon of bleach and it should have raised it to 6 but this morning it was at 7.5. I don't think I'm off that much on size of pool (it is a 19'x37' free form that goes from 3.5' to 7') What does a consistent CC of .5 mean? Should I be concerned?
According to the Chlorine CYA Chart the recommended levels for CYA of 30 are min 2, target 4 and shock 12. So anything under 12 is fine. Good job working on dialing in that number.
When you take a water sample, should you do it when the filter is running or does it not matter?
You filter should run 30 minutes or longer before taking a sample to make sure things are mixed well.
And if you're a pool nerd like me, you collect your sample using a 6' section of 1/2 inch PVC to get pool water from way below the surface...
Oh, come on - You use that pol not because you are a nerd, it's because that darn water in MN is very cold except two weeks a year
Oh, come on - You use that pol not because you are a nerd, it's because that darn water in MN is very cold except two weeks a year
LOL!! Yeah! After he drills a hole in the ice to put the pole through!
Test results from this morning:
FC - 3.5
CC - .5
pH - 7.8
Lost about 3.5 FC yesterday. I added 6lbs of CYA the other day so I am assuming it is at 30 since I was at 0. The target FC for 30 is 4. Should I add some bleach in today to bring it from 3.5 to 4 or should I go a little higher since it looks like I'm losing about 3-4ppm of FC per day?
FC - 3.5
CC - .5
pH - 7.8
Lost about 3.5 FC yesterday. I added 6lbs of CYA the other day so I am assuming it is at 30 since I was at 0. The target FC for 30 is 4. Should I add some bleach in today to bring it from 3.5 to 4 or should I go a little higher since it looks like I'm losing about 3-4ppm of FC per day?
Yes, those are all good factors to use when determining how much chlorine to add to your pool. Assuming CYA is 30 for now is correct. Good work. Just to review the numbers, min is 2 target is 4 and shock is 12. Usage is 4ppm recently. The MAIN GOAL here is for your pool to never have FC drop below 2ppm. Based on that I would add chlorine to 6ppm. Also, note that it is safe to swim as long as CL is below shock level and your pool is clear.
I added 1 gallon (121 oz. to be exact) of bleach, waited about 45 minutes and tested. FC is now at 7.5 so it increased 4ppm. I'm thinking I have the wrong size for my pool if it went up that much from one gallon. I think my pool is closer to 21k gallons and not 25k even though a 19'x37' freeform going from 3.5' to 7' deep in poolmath says it is about 25k gallons. Should I be adjusting the pool size closer to 21k based on what I'm finding by adding a gallon of bleach?
Yes, there are a lot of variables in calculating pool volume. Good job figuring that out.
the more you add chemicals and watch the result will allow you to get fairly close to the actual volume.
Tested this morning:
FC - 3.5
CC - .5
pH - 7.8
I added a gallon of bleach yesterday and about 1/8 gallon of acid. It seems that wasn't enough acid as it didn't bring down the pH so will add about 1/4 gallon to see if I can get it down to 7.5. I'm also losing about 4ppm of FC per day. With a target of 5 but losing 4ppm per day, wouldn't that take me too low with just 1ppm at the end of the day? Should I be shooting for keeping it at least 6ppm? Should I also be adding more CYA to help to keep from losing so much FC per day? Right now, my CYA should be about 30-35 based on the 6lbs I added a couple of days ago. I'm not going to add any more for at least a few more days until I can get an accurate CYA test but once that is done, should I be raising the CYA a little more to keep from losing so much FC?
FC - 3.5
CC - .5
pH - 7.8
I added a gallon of bleach yesterday and about 1/8 gallon of acid. It seems that wasn't enough acid as it didn't bring down the pH so will add about 1/4 gallon to see if I can get it down to 7.5. I'm also losing about 4ppm of FC per day. With a target of 5 but losing 4ppm per day, wouldn't that take me too low with just 1ppm at the end of the day? Should I be shooting for keeping it at least 6ppm? Should I also be adding more CYA to help to keep from losing so much FC per day? Right now, my CYA should be about 30-35 based on the 6lbs I added a couple of days ago. I'm not going to add any more for at least a few more days until I can get an accurate CYA test but once that is done, should I be raising the CYA a little more to keep from losing so much FC?
Yes, aim a little higher on FC. Maybe add twice a day. It is very important not to drop below the min.
Tested this morning at 11am and pH was 8.2 so added about 1/2 gallon of acid. Just tested at 7pm:
pH - 7.3
FC - 4
CC - .5
TA - 80
CH - 175
CYA - 20 (It was cloudy at 30 and actually disappeared somewhere between 30 and 20 so not sure what reading that actually means)
Should I be worried about the low pH and the low CH? Since it is a new plaster pool, I'm thinking the pH is going to continue to rise for a while which is why I'm having to add some acid every few days so thinking don't need to do anything to raise the pH, just let it raise on its own.
I'm also going to add about 2 lbs of CYA to get it up closer to 40.
What about the CH? Should I be concerned since it seems to be below the recommended range?
pH - 7.3
FC - 4
CC - .5
TA - 80
CH - 175
CYA - 20 (It was cloudy at 30 and actually disappeared somewhere between 30 and 20 so not sure what reading that actually means)
Should I be worried about the low pH and the low CH? Since it is a new plaster pool, I'm thinking the pH is going to continue to rise for a while which is why I'm having to add some acid every few days so thinking don't need to do anything to raise the pH, just let it raise on its own.
I'm also going to add about 2 lbs of CYA to get it up closer to 40.
What about the CH? Should I be concerned since it seems to be below the recommended range?
PH above 7.2 is OK. Would not hurt to bump it up to 7.5. I think since your pool is new that it would be good to let the CH wait a bit. When did you fill? Wait at least a month to adjust it.
I filled two weeks ago. Should I add borax to raise pH or just let it drift up on its own?
Test from this morning:
pH - 7.5
FC - 3.5
CC - 0
Added 1/2 gallon of bleach to get FC up to 6.
For the CYA test, if the dot disappears in between 20 and 30, does that mean it is 25 or is the test not that precise? Trying to figure out what I should put in the calc as the current to figure out how much to add to get to a target of 40.
pH - 7.5
FC - 3.5
CC - 0
Added 1/2 gallon of bleach to get FC up to 6.
For the CYA test, if the dot disappears in between 20 and 30, does that mean it is 25 or is the test not that precise? Trying to figure out what I should put in the calc as the current to figure out how much to add to get to a target of 40.