I just tried to answer your post in the other thread! Been chasing you. Here's my original answer:
With the kind of heat we get, your CYA should be in the 50-60 range. Pucks won't get you there fast enough. You'll chew through chlorine faster just waiting for it to climb. Add stabilizer using the sock method. Use the pucks for vacation.
Mine was around 30 also and once I upped to 50 cut chlorine use way down.I'm also in NC and the heat this week is eating up my FC. I setup my pool last week and my CYA is at 30. Thinking I should up it a bit but I'll wait to see what everyone else has to say about it.