High FC

[genlee]

Latest test indicated that FC is 8.5. Other readings were Salt=3100, Temp=54, pH=7.8, CH=75, TA= 120 & CYA=50. The GA days have been cloudy and RAIN.
Should I move the AquaRite to the off position and just use the filter in an attempt to lower FC?

 

[Jimrahbe]

Lee,

The filter will not reduce you FC, but it will go away on its own..

An FC of 8.5 is not really a concern. You'd have to be over 20 to be a problem with a CYA of 50.

Your SWCG should have a % of output that you can adjust down or just run the pump less.. Either or a little of both will work to reduce the amount of chlorine that your SWCG is making.

It is almost always better to have your FC be a little high vs. being too low.

Thanks,

Jim R.

 

[cognitios]

Your readings look pretty good. I would recommend lowering your SWCG a notch or two until you’re around 3-5 ppm.

I would also recommend adding some acid to lower your ph to 7.4, you alkalinity should take the hit and stay within range and with all the rain it’ll probably bounce up regardless.

 

[genlee]

Lee,

The filter will not reduce you FC, but it will go away on its own..

An FC of 8.5 is not really a concern. You'd have to be over 20 to be a problem with a CYA of 50.

Your SWCG should have a % of output that you can adjust down or just run the pump less.. Either or a little of both will work to reduce the amount of chlorine that your SWCG is making.

It is almost always better to have your FC be a little high vs. being too low.

Thanks,

Jim R.

Thank you Jim.

 

[Jimrahbe]

Lee,

Just make sure you keep your FC at or above your target level for your CYA per this chart... FC/CYA Levels

Jim R.

 

[genlee]

Lee,

Just make sure you keep your FC at or above your target level for your CYA per this chart... FC/CYA Levels

Jim R.

Since the FC is 8 and the CYA is 50, do I need to raise the CYA to 115 (per the chart) or wait until the FC lowers?

 

[scottts]

No! Don't chase the FC by raising CYA. You can't easily reduce CYA. FC moves all the time.

 

[Jimrahbe]

Lee,

CYA is there to prevent the sun from consuming all your chlorine in a few hours. 50 is as high as we like to see it in a non-saltwater pool. In saltwater pools, we like to see a CYA of 70 or 80... This time a year it is not a big deal, but as the summer gets here, if you find that you have to turn your salt cell's output way up to keep the chlorine in your pool, then I would suggest that you "slowly" bring your CYA up to 70..

What you should see is an increased demand for FC as the summer gets here. Until you get a feel for how much chlorine your pool uses, I suggest that you test every day or two and if you see your FC starting to go down below your target, then increase the cell's output. If the FC is trending up, then lower the cell's output. Keep in mind that you looking at the big picture and not just one day. You should not try to adjust on a daily basis, but on more of an average...

If you can, test at about the same time of day. The best time is just before the pump is scheduled to come on. This is because this is the time that the FC should be at its lowest level. The whole key to our process is to never let the FC fall below the minimum level shown in the CYA to FC chart.

If you have not done so already, you should take a read through our Pool School.

Thanks,

Jim R.

 

[genlee]

Lee,

CYA is there to prevent the sun from consuming all your chlorine in a few hours. 50 is as high as we like to see it in a non-saltwater pool. In saltwater pools, we like to see a CYA of 70 or 80... This time a year it is not a big deal, but as the summer gets here, if you find that you have to turn your salt cell's output way up to keep the chlorine in your pool, then I would suggest that you "slowly" bring your CYA up to 70..

What you should see is an increased demand for FC as the summer gets here. Until you get a feel for how much chlorine your pool uses, I suggest that you test every day or two and if you see your FC starting to go down below your target, then increase the cell's output. If the FC is trending up, then lower the cell's output. Keep in mind that you looking at the big picture and not just one day. You should not try to adjust on a daily basis, but on more of an average...

If you can, test at about the same time of day. The best time is just before the pump is scheduled to come on. This is because this is the time that the FC should be at its lowest level. The whole key to our process is to never let the FC fall below the minimum level shown in the CYA to FC chart.

If you have not done so already, you should take a read through our Pool School.

Thanks,

Jim R.

Thanks for the reply Jim. I have read through the pool school but find it difficult and frequently lose my place. Would like to be able to download the contents. Oh well, I will eventually learn this operation.

 

[Jimrahbe]

Lee,

Try this... Pool School by Trouble Free Pool - Books on Google Play

Thanks,

Jim R.

 

[genlee]

Lee,

Try this... Pool School by Trouble Free Pool - Books on Google Play

Thanks,

Jim R.
That's better. Thanks