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To "mknauss" Thanks so much for your reply. I've done exactly what you stated, but I was wondering how accurate the SWCG is... for example new vs. aged unit or salt level high vs. low. Specifically, the results of this calculation suggests that my daily FC use comes out to 1.6ppm... a very...

To "mknauss" You indicated that your SWCG is delivering 4.5ppm. Help me understand how you know how much chlorine your SWCG is producing. Do you just rely on what the manufacturer reports in it's specs (adjusting, of course, for your daily run-time)? Or is there something else in your...

Lower in morning than in the previous evening? Try OCLT. Not sure if my situation matches yours entirely, but I'm in central Florida hot sun like you, and a few weeks ago it seemed that my SWCG couldn't produce enough chlorine as I pushed it to nearly 100% run-time (over 8 hrs). All chem's...

Yes, I observed a similar decline (high salinity subsequently diluted to desired salinity) when my T-cell-15 was failing.... but smaller numbers than yours. The display always read about 500ppm lower than actual. When my salt was too high, the cell seemed to function... that is I could tell...

UPDATE: For the record, the Hayward website now shows that the T-cell-940 produces 1.47 lbs/day chlorine... same as the T-cell-15. Since my new T-940 cell must be producing the same as my old T-15 cell... I guess there's currently something driving increased chlorine demand in my pool...

My recent experience with a failing T-cell-15 sounds somewhat similar to yours. When the display reading for salt level started going down (similar numbers like yours), my service tech (a manager, no less) simply added salt. FYI, the Hayward manual says says that given a low salt display...

Imprinted on a label on my new T-cell-940 : 24 VDC, 5 A MAX Is this advertising or a warning or what? You know... sometimes manufacturers want to brag about their product..."We run our current no more than 5 amps, so your electric bill will be half of our competition." Or a label could be...

SWCG Reduced Efficiency as it Ages? Yes, I've watched my T-15 cell performance degrade over the last 5 years. "Performance percentage" of the cell has been defined as the ratio of instant cell salt reading divided by actual salt concentration. My new cell reported greater than 100% first year...

Thanks, James, for moving this to new thread. I agree with you that most service folks suggest that variations from actual can exceed 400 or more. But that's not what I've monitored for about 4 years. My old T-cell-15 always reported salt levels within 100 ppm from "actual" salt strip...

Moved from here. Well JamesW, now you've raised another question about which I was considering adding a new thread. (Since I'm new at this... let me know if new thread is warranted) My new T-cell-940 does NOT report the correct salt level. And, yes, I understand that this "calculated" level...

I can't argue with your logic... I had never looked at the T-9 specs. I also inquired about this with Hayward (3 times) but never received a response. Maybe you have a more direct line with them and can get the information corrected. What I don't understand is my early experience with the...

Hayward website has a comparison capability. Also, I've attached a screenshot. TurboCells | Sanitizers | In Ground Pool Sanitizers - Hayward Pool Products

I have a written 4-year warranty on the "extended life" Hayward T-cell-940 which I just purchased. My old T-cell-15 failed after 5 years in the Florida sun, so I'm hoping this one lasts longer. It's interesting that Hayward specs show that this new cell has a max daily output of 0.98 # chlorine...

Thanks for being the first to feed back.... just getting to learn the ropes about forum communications. I had read the "ABC's..." a long time ago as a guest on the site, but I reviewed it again just now at your suggestion. The test kit has been overworked for the last 2 years when we first...

Thanks for being the first to feed back.... just getting to learn the ropes about forum communications. I had read the "ABC's..." a long time ago as a guest on the site, but I reviewed it again just now at your suggestion. The test kit has been overworked for the last 2 years when we first...

Originally intended pool to be "hands-off"... let the pros clean and maintain. Wrong! Too many issues! I'm a retired engineer always trying to understand how and why things function. Have gone opposite extreme to "hands-on" and now want to know all the details. Pool chemistry complex and...