cyanuric acid level is zero

[ksue44]

I'm opening a newly installed 22K fiberglass pool and have added 15+ lbs of cyanuric acid and still have a zero reading. Any thoughts why nothing is registering?

[PoolDoc]

It may just not have dissolved, but it could be other things, as well:

• How did you add it?
• If you put it in via the skimmer, did you clean the filter within the 72 hours AFTER you added it?
• How many hours per day is your pump on?
• What -- mfg & EXACT product name -- did you add?
• How did you test? ('Guess-strips' are bad at best, but when testing stabilizer, they are at their worst!)