Ok well if its the API reef kit you still want the saltwater kit.
Here is what I use
API saltwater master kit
(ammonia, nitrite, nitrate, high range Ph)
And I also use
API carbonate hardness kh
API calcium test
And I'm fixing to buy the phosphate test
What type of fish are you wanting?
I didn't cycle with fish I had a ammonia source then used bio spira then once everything but nitrates were 0 I done a water change and added a pair of clowns
Reason I asked about what fish you want is damsels can be a little aggressive and a pain to remove from a tank with live rock.
I would definitely add more rock as soon as you can