Expanding my test kit

[Cash Strapped Reefer]

So I'm back into reefing after 10 years away and I'm doing it with a nano until we buy a home.
Just to get me up and running I got the standard API kit of PH, Ammonia, Nitrite, and Nitrate. It's what I had available at the time and I know it's faults, but figure I'll use it up.
In order of purchase, what other single kits should I buy?
I can get Salifert kits local or I can order online.
Calicium, phosphates?
I'm not dosing other than the occasional Seed bacteria.
I'm open to dosing as needed too.

 

[lapin]

If you’re doing regular water changes I would not worry about too much testing. Salfert does make good kits.

 

[Big G]

Are you planning fish only, corals only, or . . . ?

 

[Snoopy 67]

I found Salifert Phosphate difficult to read a determination in the low range.
I also have trouble with their Nitrate kit & the reddish colors.
The NYOS Nitrate kit is yellow in color with color sheets & is much better for me.

 

[Cash Strapped Reefer]

Are you planning fish only, corals only, or . . . ?

I've got fish, soft corals, Zoas, LPS

 

[Big G]

I've got fish, soft corals, Zoas, LPS

Depending on how much testing you prefer to do, you may want to consider adding the Red Sea "Reef Foundation" kit (Calcium, Alkalinity, Mag.). It has a nice titration setup that makes good testing easier, and you can buy the refills of reagents separately; costs less in the long run.
For phosphates, the Hanna Checker for "Phosphate Ultra Low Range PPM "HI774" is pretty nice and so much easier than those color matching tests.