I keep back-ups for levels that I test. With that said the only things I test/monitor regularly are salinty (I use a refractometer and a lab-grade floating hydrometer), temp, and Nitrate. In my QT tank I use a Seachem Ammonia badge and I have an API liquid kit as well.
I do have LaMotte Alk and Ca kits, and an ELOS Mag kit but I don't regularly use them. All of my corals are tough as nails. When I use to keep an Acropora
dominant system, it was a whole 'nother story
As you mentioned Mucho, most of my (personal) "testing" is through observation.
Anyone keeping multiple test kits keep in mind they do have a shelf-life
... many are a year, some more, some less.
I do keep back-up powerheads and return pump with fittings already on it.
Originally Posted by Skyhigh
For sure i all ways have 2 of each test kit, there has been a few times where i got a crazy reading just to come to find out that the test kit went bad. I even went as far as buying 2 refractometers.
Since when do you test?!?