What should I be testing for?

[Kostas]

Turning my 90g into a reef tank, so far I just got some GSP, Frog spawn, Kenya, xenia, galaxy corals in my tank…( added all yesterday )
I only have a test kit for the basic nitrate, nitrite, ammonia, and ph.
Today I bought a reef kit test kit that has calcium, carbonate hardness, phosphate and nitrate.
Was that a good buy or should have I gotten something else? Ex. Iodine? Or Alkalinity?
I’m curious what do you guys test for??

Oh I only use prime and stability to perp my water, and in my tank I use ‘purple up’ every other day. ‘ agagamilk’ everyother day and something called ‘cotal vital’ also for my live rock.