MOLT & MOSS NEOCARIDINA DECISION CARD
Version: 1.0
Reviewed: 2026-08-12
Topic: Plan water changes and top-offs

Situation: You need to replace water, top off evaporation or service the system.
Observe first: Name the purpose, measure source and tank water, check temperature and recent trend, and separate evaporation from material accumulation.
First action: Prepare replacement water for the actual decision and make a measured change whose volume and chemistry you can record.
Record next: Record source, treatment, volume, temperature, GH, KH, conductivity or TDS when relevant, and before and after observations.
Stop boundary: Do not use a fixed percentage as a universal rule or use top-off water to claim that accumulated material was removed.
Permanent card: https://moltandmoss.com/care/action-cards/water-changes
Governing guide: https://moltandmoss.com/care/water-changes

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