Question about Intex Automatic Salt Water System for Above Ground Saltwater Pool

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I have had may saltwater system for 3 weeks. Every second day, I get errorcode 91, and I have been adding 10 kg every time. Is it normal to add so much salt. I have a 12.000 liter pool.

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  • rkrk713 Jul 23, 2010

    Thank you! I knew about the procedure, but didn't think it could be the problem after such a short time. The electrolytic plates were completely covered with white stuff. I had to fill the chamber to times with vinegar and let it stay for 3 hours each time. I also had to half empty the pool and refill it again. Now everything is working fine, but in maximum 2 weeks time, a will clean the plates again. Code 91 should be called "clean electrolytic plates" and not "low salt". Thank you for your help. This forum is a great place!

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Hi, the error code 91 indicates that the salt is too low.. If you have hard water in your location you may want to try cleaning the electrolytic plate. I had the same issue where no matter how much salt was added I had code 91. I shut the water down going through the filter / generator. Pulled the outlet hose off and put on a cap. Pulled copper cell out and filled chamber with vinegar. Put cell back in and let set for 1 hour. Fluhed it out and hooked everything back up. Nop more salt problems. The process is in the book.
Take care

Posted on Jul 22, 2010

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3 Answers

I have done everything the manual says, but my saltwater system will not stop blinking error code 91. The salt level is fine, and the cell is clean. Do I need to replace the cell. My pool is now green and...


Bummer!!! Looks like you checked both things that would cause the code 91 error for "Low Salt". Here's what I've done to solve my low salt "91 code in the past.. I overshoot by 1/2 bag = 20lbs of the recommended salt add quantity when the code appears. Calculate by using this formula..
.0067 X Pool Gallons. I have a 14,000 gallon pool and when I get the 91 code for low salt, I add about 110 lbs of salt. Manual says 93 lbs...let it circulate for 24 hours by running the pump only and then start the chlorination cycle.. Before doing this, you MUST make sure the cell in clean.. If any calcium buildup inside, it can give you a false "Low Salt" alarm.

I hope this helps!!

If this helps, please rate... Thanks

Jul 17, 2011 | Intex Automatic Salt Water System for ...

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Jun 17, 2010 | Intex Automatic Salt Water System for ...

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I am starting an above the ground pool with a salt water system


25 pounds per 1,000 gallons or 3 kg per 1,000 liters of water.

Jun 02, 2010 | Intex Automatic Salt Water System for ...

1 Answer

I have just commissioned my intex pool and added inuitially 20kg of salt (as proposed) then added a further 5kg as the code 91 was beeping. It says in the manual when you have low salt you add 10 kg but...


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May 21, 2010 | Intex Automatic Salt Water System for ...

1 Answer

The error 91, low salt keeps coming on


What size pool if it is less than 4000gal then add 20lbs salt over 4000 ad 40 pounds.
Let disolve for 24 hours with just your filter running. Check salt ppm
It should be as close to 3500 as possible.
test kits cost about 11 dollars for 10 tests

Sep 18, 2009 | Intex Automatic Salt Water System for ...

1 Answer

High PH and ALK


Yes you can. You need to lower the Alkalinty by adding the Muriatic acid in colums in the deep end of the pool. Then address the ph. It will come down somewhat with the lowering of the Alkalinity.

Jul 20, 2009 | Intex Automatic Salt Water System for ...

2 Answers

Low salt


Same here, been getting the 91 code, 3 times in last 1 1/2 weeks. Added salt. Came on today, so I checked titanium plates and they were half clogged with white stuff. DO NOT ADD SALT just because 91 code is on, which I have done. . You need to check plates and clean if clogged, with hose and some pressure. I used a plastic wire tie to clean, do not use metal item to clean plates, you'll scratch the plates and ruin them. Mine was clogged on 2 plates full length.

Jul 18, 2009 | Intex Automatic Salt Water System for ...

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