Have you confirmed what chemicals (and dosage) the pool company added? I wouldn't add any until you know what is "already" thereNo, it hasn't been added. I don't know what the CYA is yet. Good news is TFP just emailed back to confirm my kit will ship tomorrow.
Smart to add CYA stabilizer now? Or do we need to wait for tests?
Do keep adding FC for a target of 5 daily until your test kit comes. You can add it in the evening for the most effectiveness