shelaghfishface
the one and only
I haven't tested my water in more than 20 years or so I would say.
It's NOT because I'm such a great fishkeeper and don't need to but I only have had Piranhas and large aggressive cichlids and I know how each should act so I go by their actions/reaction, their coloration etc on how the water is more or less, as l/ong as I continue the same husbandry practices. I also know how they should act if something was wrong and by the way they acted I would most likely know what it was.
I woudn't hesitate to go buy a testing kit if anything was out of the ordinary and I would always have one handy if it had eternal shelflife.
thats exactly what i was talking about, you know what you are doing, i have lots of catching up to do