To follow up on what Carl said:

1) You should not do *ANY* of the things the pool store told you to do, at least not now. Instead, add 4 gallons of plain 8.25% household bleach EACH EVENING (not: morning or midday) until all the algae is gone.

2) By the time that happens, your friends K2006 kit should have arrived. Report test results, using that kit.

3) We have very limited patience with 'relay pool care', where a 3rd party (you!) keeps running between us and the pool owner. It's hard enough, helping with pools we can't see. If you don't have authority to act, have your friend register.