My meter for testing my home air is here.
I had it up and running now for a year.
I do a scheduled routine maintenance
and water change every other week.
Before I start the first thing I do is test
the water parameters. I’m not getting
any reading in PPM. Let’s not do a water
change. Let me test in PPB.
PPM and PPB are units used in atmospheric chemistry to describe the concentration of gases. PPM stands for parts of gas per million parts of air, and PPB is parts per billion.
Marine grade vs scientific grade.
ppb (or ppbV) is often used to describe concentrations of contaminants in air (as a volume fraction). In this case the conversion of ppb to µg/m3 depends on the molecular weight of the contaminant.
Mine is better than yours.