Didn't know where else to put this that would be appropriate, so here it goes......

Looking on amazon for a solar cover for my pool, I came across this aquapill.

Makes me wonder just what it is anyone that actually USED this would be doing to their pool chemistry. No clue what is in the "pill".

I know from what I've almost learned here, that it would be something I may not want messing with my already poor chemistry.

Anyone know what these are made of or how they work?