I don't blame you for being cautious.

I'll look at my registration info and see what I can do.

As for the hth tabs,I know they are the cause of my problem so for now I'll buy more of the dual action and hope the trouble stops.I thought I had bought enough chlorine to finish the season but , $10 saved turned out to be $60 wasted. Maybe next yr. I'll get a chlorinator and stop putting tabs in my skimmer.Then use these tabs that way,unless I hear of other trouble with them.Anyone else on here adding tabs to skimmers stay away from these!

Thank you for the help. Gary