Care
Mar 1, 2026
How often should I test reef tank parameters?
Quick Answer
Test core parameters weekly in stable tanks, and more often during new setups, livestock additions, or dosing changes.
For most established reef tanks, test key parameters once per week and keep a log so trends are easy to spot.
Recommended testing cadence
- New tanks: 2-3 times per week while cycling and stabilizing
- Established tanks: weekly for alkalinity, nitrate, phosphate, and salinity
- After major changes: test within 24 hours after dosing changes, livestock additions, or equipment swaps
What to test most often
- Salinity and temperature: frequent spot checks
- Alkalinity: at least weekly, more if dosing
- Nitrate/phosphate: weekly to control nutrients
Use calculators to plan adjustments
When tests show elevated nutrients, run the Water Change Calculator to estimate how much water to change before your next maintenance session.
Track all readings in the ReefBay app to catch drift early. Open directly in-app at /app/calc-water-change.
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