You can also add stabilizer via dichlor (granulated chlorine is usually either cal-hypo or dichlor, and is usually what people refer to as "shock"--if you use the dichlor, be very aware of your pH because it is very acidic like trichlor it) or you can just add stabilizer by itself--it's usually labeled conditioner, balancer, or stabilizer--but if you'll look at the label, the active ingredient should be cyanuric or isocyanuric acid.
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