I believe you can also order reagent refills from Amato Industries, but you can also get them directly frrom the Taylor site (taylortechnologies.com). I usually get mine from www.spspoolspas.com, since they have one of the best prices I've found. You might look at the instructions that came with your 5-way kit and see if there's a phone number there to reorder reagents, and compare their prices.
I would wait to start lowering your alk until the pool shocking is done, because the amount of acid you use at a time to lower the pH and alk depends on an accurate pH result, which you won't have when your chlorine level is above 10 ppm. With chlorine levels above 10 ppm, pH results tend to read falsely high, so you might end up accidentally lowering your pH by too much by depending on a false high number. Get your chlorine issues adjusted first, and then when you can let the chlorine drift back down to "normal" ranges, then start working on the TA.
Janet
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