If you go to Mantua hit up the pool store. My last 5 gal was still 12.5 or better 2 weeks ago. they keep it in the store. 2 1/2 7 5 gal.
Or try Budds, they treat it like its hazardous there. Plastic bags to return in.
I know the Leslies in Wash Twp keeps it inside too.
If it does not say Polyquat it probably is not.
Ed, I just read through this thread and have to say I really enjoyed it! You are awesome! It was so nice to see someone who was so quick to learn the ins and outs of great pool care. Well done everyone that helped him out and well done on him following directions and being willing to ask questions! I can't wait to see this pool when you open it. I hope you stick around and see if you can help others. In doing so you will learn even more! Pick some thread and just read them. That is the best way to learn new things!