Coming off of a slam, FC drop can be slow or fast. There is no real "normal". Let's see where you are tomorrow. Be sure to get a close-up pic with a brush or something.
First time green pool
- Thread starter vaalpens
- Start date
This is a picture from this morning without the pump running. A picture doesn't always show how clear it is due to the glare of the sun, but it should do. The mark around the drain is a stain, showing that the plaster is not in the best shape and probably need to be redone at some point in time.
And a later picture which probably puts it in a better light.
I'm planning the test about the same time as yesterday, around 18:30. There will still be some light left, but the pool would have been in the shade for a while.
Wow. I'm no longer doubtful. The water looks spectacular! Great job!
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Thanks.
I just completed my second post-SLAM test about 23:15 after previous test:
Target FC: 7
FC: 11.0
CC: 0.5
My FC reading is still over 10 and over my target, but I am still going to err on tide of caution and add 32oz of 8.25% bleach. This should raise the FC by 1.9 if my calculation is correct.
The pool still looks great, so now I just want to get to a nice sustainable process, until the next sand storm hits, and then it will be all hands on deck again.
They call it the Phoenix Haboob. I think the last one pushed my pool over the top and that is when I found this forum. I will be much better prepared for the next one.
I think another light bulb came on today for me. I was concerned about a comment I received regarding loosing 9ppm of FC when I came out of SLAM. Yesterday I was loosing less, but I could not be sure since I did not test the FC early in the morning. Reading up a bit I found this post from duraleigh:
Based on the above explanation, it seems you loose about 50% of the ppm. My plan is to add enough bleach at night so that after 24 hours, I should not have a lower FC than my minimum required.
My CYA reading was just above 50, but if I use the higher 60 value, then my target FC should be from 5 to 7. Based on this range I think for now I am going to plan to raise my FC to between 10 and 14 at night, to ensure that with the next reading the FC should be between 5 and 7.
Obviously every pool is not the same, but this for now is the direction I would like to take until I am proven wrong, or we get a dust storm.
Based on the above explanation, it seems you loose about 50% of the ppm. My plan is to add enough bleach at night so that after 24 hours, I should not have a lower FC than my minimum required.
My CYA reading was just above 50, but if I use the higher 60 value, then my target FC should be from 5 to 7. Based on this range I think for now I am going to plan to raise my FC to between 10 and 14 at night, to ensure that with the next reading the FC should be between 5 and 7.
Obviously every pool is not the same, but this for now is the direction I would like to take until I am proven wrong, or we get a dust storm.
Completed another post-SLAM test about 24 hours after previous test:
Target FC: 7
FC: 10.5
CC: 0.5
With my calculation I thought my FC reading would have been (11+2)/2 = 6.5 (loosing 50% of FC ppm), but I only lost 2.5ppm. Maybe I added more FC than my calculation.
Tonight I have added another 24oz of 8.25% bleach to get to 12ppm FC. If tomorrow is a normal day and I loose 50% of the FC ppm, then I should be at FC 6, and will be able to test my pH.
For now I am just biting off a little bit at a time even though it is delaying my pH test a few days.
Target FC: 7
FC: 10.5
CC: 0.5
With my calculation I thought my FC reading would have been (11+2)/2 = 6.5 (loosing 50% of FC ppm), but I only lost 2.5ppm. Maybe I added more FC than my calculation.
Tonight I have added another 24oz of 8.25% bleach to get to 12ppm FC. If tomorrow is a normal day and I loose 50% of the FC ppm, then I should be at FC 6, and will be able to test my pH.
For now I am just biting off a little bit at a time even though it is delaying my pH test a few days.
You can always test a half hour or an hour after your add to see if you hit your goal. Bleach strength, pool volume, etc., etc., can vary. Then you know your actual result.
Thanks, I will definitely do this test over the weekend juts to see how the calculation compare to the actual results.
Completed another post-SLAM test about 24 hours after previous test:
Target FC: 7
FC: 9
CC: 0.5
pH: 7.9
TA: 150
I need to adjust my pH at some time, but since FC 9 is still close to 10, it looks like I will wait another day before adjusting the pH. Before I adjust the pH though, can somebody maybe give me some idea by how much the pH goes up if I run the aerator about 8 hours a day? Will I be continuously fighting to lower my pH because of the aerator?
I added only 16oz of 8.25% bleach tonight to target an FC of 10, and then see how far it will go down tomorrow. Hopefully the lowest it will go will be 5.
Pool still looks great, no change in the water. Thanks again to all the advice I have received on this forum.
Target FC: 7
FC: 9
CC: 0.5
pH: 7.9
TA: 150
I need to adjust my pH at some time, but since FC 9 is still close to 10, it looks like I will wait another day before adjusting the pH. Before I adjust the pH though, can somebody maybe give me some idea by how much the pH goes up if I run the aerator about 8 hours a day? Will I be continuously fighting to lower my pH because of the aerator?
I added only 16oz of 8.25% bleach tonight to target an FC of 10, and then see how far it will go down tomorrow. Hopefully the lowest it will go will be 5.
Pool still looks great, no change in the water. Thanks again to all the advice I have received on this forum.
I don't know about how much your aerator will raise the pH, just that it will. I assume you are using it to cool your water temps....
Once you get your pH down, you could try NOT running the aerator and see where you are in two days. Then run it for two days and see where you are. The difference between the two would give you an approximate idea of the expected pH rise in your pool.
Once you get your pH down, you could try NOT running the aerator and see where you are in two days. Then run it for two days and see where you are. The difference between the two would give you an approximate idea of the expected pH rise in your pool.
Thanks again for the advice. You have been a great help and inspiration through this process.
I will probably test both the pH increase and the actual FC lost next week, since it seems I am getting to a consistent FC of below 10ppm.
My test results from today are:
FC: 7.5
pH: 7.9
TA: 140
I have added another about 36oz of 8.25% bleach today and will evaluate again tomorrow. I think I will be happy if can get/keep my reading after the daily FC loss to around 6 or 7.
Later tonight I will add some muriatic acid to lower the pH to around 7.5. Tomorrow it will probably be higher again, but I will also check to see if the TA came down. If the TA came down then it probably meant that the aerator increased up the pH again.
Your FC target is 7 with a CYA of 60. It seems like you are ready to slow down the chlorine additions. You just want to make sure that your FC NEVER falls below 5ppm.
Let us know your next results. You're doing great!
Let us know your next results. You're doing great!
Tsudduth
0
This is something I thought that I wouldn't have to do until later in the season, but I had to get a solar cover for my new pool. We have had an unusually wet and cool summer for West Texas. I went away for the holiday and before that had lots of rain. So now I have a green pool. I plan on starting a slam tomorrow.
I was wondering if the solar cover (which is clear) will act as a green house and help the algae to bloom faster?
Thanks again for the advice.
I know I am still running a bit high on the chlorine, but I am trying to slowly bring it down so I don't go below 5ppm. Everything being equal, tonight I should be below 7.5, and then I can make another adjustment. last night I targeted about 9.7ppm. My feeling is that I will settle on a target between 8 and 9 when adding chlorine, which will then put me around 5/6. The season is also changing, so I assume it also has an impact.
Basically the cooler the water, the slower everything is. Algae takes longer to grow, less UV to burn off FC, usually less swimming to use up FC etc. You will find out how your pool reacts with your testing and with the knowledge you have will know what to do
Well done on clearing your pool, love that clear water you have
Well done on clearing your pool, love that clear water you have
Basically the cooler the water, the slower everything is. Algae takes longer to grow, less UV to burn off FC, usually less swimming to use up FC etc. You will find out how your pool reacts with your testing and with the knowledge you have will know what to do
Well done on clearing your pool, love that clear water you have
Thanks for the information and kind word about the pool. Even though we are still at 100 degrees where I am, this is not the same as the middle of the summer and next year will be the time that I prove to myself that I can maintain the pool at this level throughout a summer.
I like to stick to a routine with the pool now, but yesterday I had to break it already for the first time. I had to test the water earlier with still a bit of sun on pool, which probably means I was still loosing some chlorine.
The test was done about 2 hours early at 4PM and I only tested FC:
FC: 8.5
Since I am bringing my FC slowly down, I was targeting 9ppm overnight which would have required 8oz of bleach, but since I did the early test I added 16oz of 8.25% bleach. Hopefully tonight I can get back to my normal testing time to find the sweet spot keeping the FC between 5 and 7 at the end of the day.