How Chlorine works.....for newbies

[SS 396]

One more thing to add about Chlorine. It's effectiveness is influence by the pH of your pool. Chlorine is only half as effective at a pH of 7.8 then at 7.2!

Okay, I checked my pool tonight and have the kit shown below which said I was high on both counts . I dumped it before I took the pic, but it was high on both sides. So I want the chlorine to be high to get rid of my algae problem ( water is crystal clear) but I need to get my pH level down. What am I to do/use to bring that level down?

[waterbear]

If your chlorine readings are high (dark yellow to orange) then your pH readings are bogus. High clorine readings will interfere with the pH test and cause it to read as very high pH even though it is acutally much lower. Wait until your chlorine readings are in normal range before trying to check the pH.