swg and salt levels

garyg

LifeTime Supporter
Feb 15, 2008
17
phx
#1
I am reading a post from an oldtimer in Australia about increasing the ppm of salt over Manufacurer recommendations by 2000 ppm to extend the life of the SWG cell.

any evidence that this is harmful/helpful?

thanks,

gary
 

EskimoPie

LifeTime Supporter
Jul 27, 2007
278
Sahuarita, AZ
#2
I've never heard anything like that before... I wouldn't recommend trying it though. At ~3000ppm which is a common recommendation many people can't taste the salt... at 5000ppm I think it would taste very salty and would likely increase the corrosive aspects as well. Isn't sea water ~6000ppm?
 

bluenoise

LifeTime Supporter
Jul 25, 2007
187
Alamo, CA
#3
I think having too much salt increases the conductivity of the water too much and the SWG may shut down to protect itself from over-current. Mine has shut down with a light indicating too much salt when I added some salt to the pool and it hadn't mixed in, yet.

I don't know for sure, but I think the oceans are higher than 10,000 ppm salt.
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,879
Silver Spring, MD
#4
Some SWGs have an upper salt limit and some don't. For example, the AutoPilot units are fine up to higher than ocean water levels. Ocean water is around 35,000 ppm salt.
 

Poolsean

TFP Expert
Apr 15, 2007
1,462
Ft Lauderdale, Florida
#5
Running your salt system to the upper limits of the recommended salt range will slightly increase cell life, but not significant to claim any great increases in cell life.
It will allow your power supply to run cooler.

Each manufacturer has their own limits. Most have a high salt limit to protect the power supply from damage.

Increasing the salt level also will NOT increase chlorine production.

Ocean water is about 25K - 40K, depending on geographical location. Most oceans are about 35,000 ppm.

Salt Levels maintained at greater than 6,000 ppm can be corrosive to stainless steel fixtures in contact with the water. i.e. handrails, ladders, light rings, etc.
You willl definately be able to taste the saltiness at that point too.