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We have had the hot tub for about two years. I guess I really don’t know exactly what to do. We set the frog at 4 and change it every three weeks. This kind of works, but the tub goes cloudy often. Looks like I need to shock the tub, but not sure exactly how to do it. We do the TFP system...

Just for fun, this is a sight glass that I added to the backwash side of my pool diverter. Good way to know when the backwash process is done. If you add something with printed letters below the pipe, you can see the progress more clearly. You can get the clear 1-1/2" PVC online, it was kind...

Can I test CYA, pH, ALK, or CH when Chlorine is high? How often should I test FC/CC during SLAM? Thanks!