Okay, I got a YSI digital salinty meter from a friend who runs a aquaculture center. That probe says the same thing as the pool store... I'm at 4200ppm. That said... if I have a 36x18 pool that is 8ft deep at the deepest (approx 25000gal)... how much water should I replace? And what should my target salinity be?
Strange SWG issue - 5000ppm in pool, reading 2300ppm - Everything's replaced.
- Thread starter jmoch
- Start date
- May 3, 2014
- 63,018
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
The documentation for your SWCG will give you the target salt range you need. Then use Pool Math (link at top of this page) to determine how much water to replace.
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Take care.
Please put your Location in your personal settings. Also please add a signature -- see Pool School - Getting Started
Take care.
Update: I've drained about 16" of water out over the past three days and got my salinity to 3400ppm. This is the highest range of the 2700-3400 that my Hayward says it can operate. I'll be removing a little more water tomorrow but at least I'm in the right range and started up the SWG and it appears to be generating. So here's my question: The YSI salinity meter I'm using tells me I'm at 3400ppm, but the Aqua Rite says I'm at 3000ppm. Is this okay/normal? Is there something else I need to look at?
- May 3, 2014
- 63,018
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Sounds like your salt is at a range for the SWCG to work. So leave it. It will not go up unless you add salt. I imagine you occasionally get rain that might overflow your pool and thus remove salt.
Testers and especially the SWCG have limited accuracy on salt . +/- 200-400 ppm is normal.
Testers and especially the SWCG have limited accuracy on salt . +/- 200-400 ppm is normal.
@JamesW yes, this is the exact same cell. Everything seems to be operating normally today. I'll keep an eye on it and report back if anything changes.
- May 3, 2014
- 63,018
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Odd that high salt in the water was shown as low salt by the cell.
Something is not right.
But all that matters right now is it is working!
Take care.
@mknauss, yes, it is strange that high salt would cause that, but here's what I think. I think the salt as so high that it caused the new cell to overload and damaged it. The board never threw a high salt warning... it just let the cell burn itself out. I'm sure there's some really technical reason why it couldn't read the salt level as "high salt", but lesson learned.... check your salt with a taylor test kit or some other accurate measurement tool rather than take the SWG reading as accurate.
So, if anyone else reads this thread with a similar issue.... don't hook up your new cell until you've had your water tested (or tested it yourself) and it's in the correct range.
So, if anyone else reads this thread with a similar issue.... don't hook up your new cell until you've had your water tested (or tested it yourself) and it's in the correct range.