Sorry, this is just plain wrong. See Waterbear's explanation.
Tri-chlor and Di-chlor have stablizer because that's part of the chemistry that makes them. And when they release their chlorine, they release the CYA too (stabilizer).
If your CYA is high, using Tri-chlor while you are away will send it through the roof.
When I'm away, I have someone dump 1 gallon of bleach in the skimmer every other day and that's all I need. I have the pump on a timer, and leave the solar cover on. So all my father-in-law has to do is dump in the bleach every other day.
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