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I'm hoping it is a transient issue. I'm not keen on disconnecting my pump for a week while it is repaired.

It is the pump that came with my pool. As far as I know it was new. I found the company who makes it in China so I think my pool store buys from them. LX Swimming Pool Pump 56SWP There is no leak. The first time it was making that noise, I cleaned around the lid O-ring. There was a blade...

I've attached a link to a Youtube video. The first 10 seconds is what I consider my pump sounding relatively normal (even though there is a bit of a high pitched noise). The second 10 seconds is where it is sounding extra annoying. It is only my second season using this pump. Here is a...

OK so it isn't simply ppm of CaCO3, it is ppm of "carbonate-as-a-base" as it were, and the carbonate ion is dibasic. Thank you very much for the clarification.

THANK YOU! I still don't get why it should matter that the carbonate ion has a -2 charge. In your calculation, you convert mol/L of sodium bicarbonate into mg/L of calcium carbonate by using the ratio of their molar masses (which I understand). Why divide by 2?

Hi, Could someone please explain (by showing me the math) how this is actually calculated. Ex. If my pool (41000L) has a TA of 104ppm and I want to increase it to 150ppm, the calculators say I need 3.3Kg of Sodium bicarbonate. HOW IS THIS CALCULATED? Thank you. OR why 680g/37854L pool will...

That's the type of material I'm looking for! Thanks guys!

Ok thank you! All of these explain things in a way that is finally satisfying. Basically, high levels of CYA/trichlor can decrease HOCl concentration (which is not specifically tested for), so with elevated CYA/trichlor in your pool, you may not have adequate HOCl. Thanks again! Feel free...

Hi everyone. Can someone provide a CHEMICAL explanation for why increased CYA levels require MORE free chlorine that the recommended 1-3ppm? It doesn't make sense to me why chlorine/hypochlorite would stop working in the presence of elevated CYA. I've watched the videos, read all the...