How often do you test?

[sumpfinfishe]

I perform my water changes on the first of every month give or take a day or two, then in the the middle of the month I do test for ca/alk.
I would and have bumped up the testing if something out of the norm takes place.

[Myka]

I have a maintenance company, and on all my clients' tanks I do the following:

Tank salinity - every week before water change
W/C bucket salinity - every week before w/c
Tanks with dosers (med-high demand) - cal and alk every week before w/c, Mg every 2nd week
Tanks without dosers, but lots of coralline - alk every week before w/c, cal every 2nd week
All reef tanks - NO3 and PO4 monthly
TDS in RO tubs - monthly
Check calibration of probes and refractometers - monthly


Fish only tanks - alk, NO3, and PO4 monthly, cal and Mg once every couple months. Yes, I dose fish only tanks. The tanks do better.