Check and make sure that the MA is 31%, not some of the newer stuff on the market that is advertised as safer to use. If it's 31%, I don't think it really has a shelf life as such, but since it is a very strong acid, the container may break down over time. Having adequate storage area might be a problem, too, since you don't want to store it where the fumes will contact any wiring.
Chlorinating liquid and bleach are both sodium hypochlorite, but the concentrations higher than 6% have a tendency to break down quickly, so depending on how old it is, how it was stored, and what conditions you will store it in will all be a factor in whether it's worth it or not. Bleach does lose strength when stored in heat, sunlight, etc. Generally, I wouldn't load up on the chlorine unless it's at a tremendous price, and unless you've tested it and know for sure that it's the concentration the seller says it is.
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