Which kit to get?

[Watermom]

The CYA test is one you don't need to test too often. If yours is at 30, you're in a pretty good spot. You might just try leaving it there. If you find that you can't keep chlorine in the pool through a hot sunny day, you might later decide to bump it up to 40 or 50, but for now I say leave it alone. You can always buy some replacement CYA reagent if you need it. For now, you don't need to test it again.

You need to keep your chlorine between 3-6 when your CYA is 30. Your readings look pretty good. The only recommendation I'll give is to suggest that you just use bleach for your source of chlorine so your CYA doesn't go up any right now. Also, no cal-hypo. Your CH reading doesn't need to be any higher either.