Who tests their water-change mix?

[StirCrazy]

I test salinity, PH and temp for my water change water. the others are kinda mute point unless you are doing a masive waterchange like ovewr 50%. you can adjust Mg, Alk, and Ca once in the tank.

my reasoning for this is if you do a 10% water change like most do weekly, then if you tank is 400Ca, 11 Alk, and 1400mg

and you add 10% new water that is 300 Ca, 10 Alk and 1200mg

then you are going to end up with a tank level of
aprox 390Ca, 10.9 Alk and 1370-1380Mg

nothing that realy scares me and minor to corect in the tank.

but if your PH and salinity are out while they will only afect the tank a little they are ones that your live stock are more supseptible to changes in.

Steve