1. Trichlor is, molecularly, a stabilizer molecule with 3 attached chlorine atoms. So, 100% trichlor does add stabilizer.

2. You can probably get away with lower chlorine levels in cool weather, but once water temps hit 70 degrees, you need to match your chlorine to your CYA level.

3. I found label info here: http://www.kellysolutions.com/erenew...1_26_02_AM.pdf

Your tabs are 80% trichlor, 10% borax, and 10% aluminum sulfate. The borax is fine -- it will keep the pH from dropping so much. The aluminum sulfate (alum) is OK . . . IF you have a sand filter. If you have a cartridge filter, you will need to clean more often. If you have a DE filter, you may also need to clean more, but I don't think the alum will hurt the filter.

This formulation does NOT contain copper, which is what stains pools.