This is my second year of pool ownership first year on Chlorine. I basically just been adding bleach so far this year. I have also used a floater with a couple of Tri Chlor pucks as well to supplement. My CYA is at 40 so I'm probably gonna go with just straight bleach for the rest of the summer.

My question is this, so far my water has been perfect I haven't even had to add baking soda or borax the water is crystal clear. I keep my chlorine between 1 and 5. So when do I need to shock? I know from reading this forum that Shock is something you do not buy. However, if I shock my pool with chlorine say taking it up to 15 ppm it would take several days for my chlorine to come back down to normal levels. The shock you can buy at the pool stores supposedly rapidly disapates overnight so that the pool is ready to go the next day correct? So what should I use to shock and should I even bother doing it as long as the water is in balance and everything is clear.