CYA still not testing after 8 days

[madwil]

the trichlor does add CYA, and over time will add an overwhelming amount so be careful with them.
The alk shouldn't be a problem, as long as your pH doesn't swing drastically- mine is at 40.

[kelemvor]

If you already added the amount your pool store told you, I would wait until you get the test kit before adding more (e.g. tricolor). If you end up with too much, it can be one of the few problems that requires a (partial) refill.