If you want to:
- take care of the pool yourself and save some money
- get advice about your pool's chemistry from this website
- ensure the longevity of your new surface
- ensure the quality of your and your family's swimming experience
- maintain the best pool water possible
then you need to learn to test the water yourself.
If you're interested in any of those things, then I'm leading you to how: first buy a proper test kit, which I described above.
No one here will (or should) be giving you any advice about what to do about your water, or any specific test result, without first seeing a comprehensive set of test results, and more information about your pool. The experts here greatly prefer those tests be performed by you, with one of the recommended kits.
For example, the various chemicals that are monitored in a pool can be dependent on each other. So asking about your alkalinity of 30, or going off and adjusting that on your own, without first understanding what the other chemicals are doing together, can cause more trouble than it might solve. The construction type of your pool, the size of your pool, the equipment, etc all can play a part in obtaining the best answers to your questions.
You haven't mentioned anything about chlorine, or how your pool is being sanitized, so that's another very important thing to know, and do.
Further, the first 30 days of a new pebble finish are very critical to how it will perform: how it will feel, how long it will last, how nice it will look, etc.
The first 14 days are more important than the 2nd.
The first week more important than the 2nd.
The first hours more important than the rest.
So your clock is ticking and the longer you wait to get your water balanced, the more risk you are taking with your finish. That's why I encouraged you to get your test kit sooner, rather than later, so that you could start right in as soon as a TFP Expert finds your thread and your questions.
I cannot speak for your pool store, or the quality of the advice you'll get from there, but TFP has a long track record of people who come here after problems arise from following pool store advice, and using pool store test results. Your mileage may vary. But in your particular case, you're also gambling with your very expensive finish, not just whether your water is green or not.
Again, I'm not a TFP expert. And I'm merely trying to get you involved with one, knowing ahead of time as I do what they're going to need from you. You are absolutely free, of course, to find your own path here.
Best of luck to you.