thank you Carl and Lisa!
I'm pretty much along the lines of Jean.......I use the pucks mainly winter/spring since I don't cover my pool, and for vacations.

I enjoy this forum and all the great help, etc.......
I'm really getting excited about getting the pool open this year, but we have another 3-4 weeks before we do that around here, so I'm using this forum to get myself ready, and to satisfy the "pool craving" until I can.

Thanks again for your kind help.

Frank D.