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Hi - Marty, not sure if you are addressing me or original poster. We use ORP as an informational tool, and to send alarms to the monitoring staff. The PPM sensors which control chlorine dispensing are quite expensive to maintain and sensitive to flow rate. In a semi commercial setting...

I entered the pool math app and setup a vinyl pool and see different recommended numbers than what you posted - particularly for chlorine: I see a recommendation of 1-3 ppm, matching the range of your other source. 10-16ppm FC would be some kind of shock level regarding TA, the range is just...

I expected no difference, yet I and others have surprisingly seen a results difference on free chlorine tests using a k-2006c by a couple of drops, using a manual swirl, meaning add say 10 drops of R-0870, swirl and then add the last few drops while swirling in between for chlorine levels around...

I have found that some lines can be brittle, and develop hairline cracks resulting tiny in air leaks that don't leak chlorine.

1. Which liquid chlorine dosing system do you use? (Chemtrol with stenner pumps) 2. Does your system respond to a sensor, or do you dial it in based on your drop-based testing? (sensor - ppm & orp) 3. What is your current pump run time? (24 hrs) 4. What is the run time of your liquid chlorine...

Hi - A condo complex I am associated with uses 4 Stenner pumps located inside a building - 2 for acid and 2 for chlorine for a pool and spa with a couple of Chemtrol pc2100 controllers. They went in last year and the tubes should be changed soon, (and downsized from a 5 to a 1 or 2). I've...

We use a lower end Chemtrol system (Santa Barbara control systems) for automation. It auto injects acid and chlorine. We manually monitor temp, CH, and TA. It works reasonably well. Skip the comm. for cost savings.

I got the kit and it was useful - I had thought using "capfuls" of gentle spa was inaccurate, and retrospectively, indeed it was. I will use a scale going forward. I am happy with the test kit. On a slightly related note, you can add me to the list of folks who saw a non trivial pH rise after...

Thanks for the quick replies - didn't know about the Taylor test. The instructions aren't online, so I don't know how easy it is to perform, relatively. I'm also curious about the postal reg issue, thanks for inquiring. I like the idea of reusing k-200x reagents for economy.

Hi - The web page for Piscines Apollo indicates they won't ship their borate test to the US. I know the lamotte test strip could be used, but I'd like to use a drop based version if possible. It seems like it could be replicated with mannitol and Bromthymol blue. Does anyone have a...