I was clearing out some junk in the garage when I came across two very old (~4+ years old) cal-hypo bags. They are 16oz bags of what was 73% cal-hypo. In my pool, 32 oz of cal-hypo would add ~11ppm FC and ~7ppm CH but the water is already at 625ppm CH so I'm not keen on using any cal-hypo for chlorination.
The plastic bags containing the cal-hypo are still in good shape as far as i can tell (no tears or embrittlement of the plastic) but the outside product labelling is definitely faded with age and, possibly, chlorine vapors bleaching the dye on the labelling. My garage is not temperature controlled and can easily get up to 120F during the hot months. I can't leave my garage doors open during the day for air circulation because we'll get lizards and pack-rats galore.
So, I guess I'm left with two options - use the cal-hypo in the pool water or dispose of it somehow. Obviously I would not throw the stuff in the trash as that would be a fire hazard and illegal. Any thoughts on how to properly dispose of it? Or am I being silly and should just dilute it and add it to the pool through the skimmer?
Any advice would be most appreciated.