Well from what I saw from your cloner I'm sure you'll build one fine. And yeah.....get some calibration solution for your meter.

If you are interested you could grab some Sweet but that's definitely an extra and you wouldn't be using it for a couple weeks anyway. The only other thing I'd think about if I were you is Cannazyme or some sort of zyme product. Again an extra but a real nice one. If you want to stick with the basics you've pretty much got what you need. Do you have some 3% h202?