Recent content by KevinL

Right. Which brings me to another mystery I've always wondered about. How do all these pool guys maintain FC levels if they only visit a pool once a week? In Southern California, I have to add chlorine every day or every other day to follow the TFP method (without SLAMMING).

Thanks for the information. I've been told by more than one expert on this website that swimming at SLAM levels is perfectly safe. Are you saying that I am wasting chlorine because the higher concentration of chlorine will speed up the reaction, using it up more quickly? Also, during late...

Is there any problem with SLAMMING your pool each time you add chlorine, to reduce the frequency that it has to be added?

During the winter there are very few times when anyone swims in our pool. When I add chemicals in the winter, I add enough chlorine to get my pool up to slam levels so I won't have to add chemicals again for 10 days or so. Anyway, I was just wondering what the maximum FC level would be for...

Thank you all for your help over the past year. I now have perfectly balanced and sanitized water. I'm very happy with that, but there is one problem that vexes me: these weird stains that keep popping up on my beautiful white, one-year-old plaster (see the attached photos). The stains in the...

Both. The picture shows the ph measured by my automation. But I found out that it's not very accurate at least when it dips down like that. I'm not sure what's going on with it.

Sure, But the best I can do is show you a graph for ORP and another weekly graph for PH. I attached them.

Thanks, that very useful info.

My test kit says the pH is 7.9. Simultaneously, my sensor says it's 8.1. By the way, I used the method described here (testing pH when FC > 10) to measure pH since my FC is around 12 ppm now.

Like I said, I don't rely on ORP much at all. I cleaned and calibrated by sensor about 1.5 months ago. Also, I do use Taylor K-2006 kit. I'd have to disagree on the Orenda calculator. I've found it accurate and convenient.

My test kit says the pH is 7.9. Simultaneously, my sensor says it's 8.1. Not horrible, but not that close. By the way, I used the method described here (testing pH when FC > 10) to measure pH.

I use the iopool Smart Water Monitor for the pH measurement. I add liquid chlorine with the pump on, wait one hour, then add acid. My test kit is about 5 months old. Thanks, I knew about the CYA rounding rule. I just feel tempted to add 5 when it's not quite there. I don't use PoolMath...

Thanks. Yes my sensor also measures ORP, but I don't really rely on it. I'm just concerned about my PH going all over the place.