Fisher of Men

I'm new to this planted tank obsession. I've had fish for years but never really got into plants. I've only got a couple of really lousy and old water parameter tests.

So my question is, what do you guys suggest I get? Is there a kit out there that has everything in it that I'll need to test that won't totally break the bank?

I don't need a Ph test, as I've got a digital meter for that... but other than this I've got nothing.

Thanks in advance for your help!