Hi
I don't think you are missing a major one. covering major points....
Just make sure you use them correct. what make do you use?
What I always suggest is that you get electronic digital meters. They are more accurate and a lot easier to use without the chance to make mistakes.
Pm me for more info on readers if you want did not load them in the online shop yet so there is little info on my site at this moment.
You will do great.
I know of a lot of breeders that don't use it because if your water changes is correct there is no need for filters even.