Thanks to all of you for the help!! I will most definitely order my test kit from the link in the signature to support this board.

Hopefully this doesn't sound dumb but I just wanted to make sure I understood correctly - that the Sam's Brand tablets that are 99% active ingredient undiluted trichlor...does that mean they do not add any stabilizer?

I have been keeping my FC around 2-3 and have not had any problems but based on the best guess chart it says I should keep it at 5. I am wondering should I increase it or leave it alone.

Unfortunately I cannot return the 50Lbs super skimmer tablets so I will have to decide if its worth losing the money or not and tossing them or trying to use them :-(