First decision

Interpret GH, KH, TDS, pH and conductivity

You are interpreting GH, KH, TDS, conductivity or pH.

Use the whole card. The action stays attached to what must be observed and recorded, plus the nearest inference or action the current guidance cannot support.

Observe first

Identify the exact measurement, unit, method, calibration or resolution and the decision you expect that number to inform.

First action

Compare like measurements and investigate the specific chemical property needed instead of treating one aggregate number as water quality.

Record next

Record sample source, time, temperature, unit, method, resolution, repeat result and any source-to-tank difference.

Stop boundary

Do not treat matching TDS as matching ions or turn a house recipe, occurrence range or seller range into a species optimum.

Continue with the governing guide

Interpret GH, KH, TDS, pH and conductivity owns the complete method, evidence, limitations and revision history. This card introduces no separate biological claim.

Teaching card titled Interpret GH, KH, TDS, pH and conductivity: first decision. Situation: You are interpreting GH, KH, TDS, conductivity or pH. Observe first: Identify the exact measurement, unit, method, calibration or resolution and the decision you expect that number to inform. First action: Compare like measurements and investigate the specific chemical property needed instead of treating one aggregate number as water quality. Record next: Record sample source, time, temperature, unit, method, resolution, repeat result and any source-to-tank difference. Stop boundary: Do not treat matching TDS as matching ions or turn a house recipe, occurrence range or seller range into a species optimum. The permanent card is at moltandmoss.com/care/action-cards/parameters and the governing guide is at moltandmoss.com/care/parameters. — Original typography-only teaching visual containing the complete card. It is not specimen evidence.

Copy the complete card

Keep every part and both permanent links together.

MOLT & MOSS NEOCARIDINA DECISION CARD
Version: 1.0
Reviewed: 2026-08-12
Topic: Interpret GH, KH, TDS, pH and conductivity

Situation: You are interpreting GH, KH, TDS, conductivity or pH.
Observe first: Identify the exact measurement, unit, method, calibration or resolution and the decision you expect that number to inform.
First action: Compare like measurements and investigate the specific chemical property needed instead of treating one aggregate number as water quality.
Record next: Record sample source, time, temperature, unit, method, resolution, repeat result and any source-to-tank difference.
Stop boundary: Do not treat matching TDS as matching ions or turn a house recipe, occurrence range or seller range into a species optimum.
Permanent card: https://moltandmoss.com/care/action-cards/parameters
Governing guide: https://moltandmoss.com/care/parameters

This card is a first-decision aid, not a diagnosis, treatment authorization, complete method or substitute for the governing guide.

Open the portable text version or open the complete visual card.

Copy the exact accessibility description

Use this complete description when a platform provides an alt-text field. Do not shorten away the stopping boundary.

Teaching card titled Interpret GH, KH, TDS, pH and conductivity: first decision. Situation: You are interpreting GH, KH, TDS, conductivity or pH. Observe first: Identify the exact measurement, unit, method, calibration or resolution and the decision you expect that number to inform. First action: Compare like measurements and investigate the specific chemical property needed instead of treating one aggregate number as water quality. Record next: Record sample source, time, temperature, unit, method, resolution, repeat result and any source-to-tank difference. Stop boundary: Do not treat matching TDS as matching ions or turn a house recipe, occurrence range or seller range into a species optimum. The permanent card is at moltandmoss.com/care/action-cards/parameters and the governing guide is at moltandmoss.com/care/parameters.

Card version 1.0, reviewed 2026-08-12. This is a first-decision aid, not diagnosis, treatment authorization, emergency service or a complete method.