Claim checked: "A TDS number tells you whether the minerals are right"

What is supported: a meter can estimate TDS from conductivity using its conversion factor.

What is not established: the display does not reveal ionic composition, separate calcium and magnesium, GH, contaminants or a species optimum.

Do next: record meter mode and temperature basis, then measure the property the decision requires.

Detailed guide: https://moltandmoss.com/care/parameters
Full claim check: https://moltandmoss.com/care/claims/tds-number