Coralkin honest saltwater & reef care

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📋 Reef Parameter & Maintenance Log (free printable)

The keepers with the healthiest reefs are the ones who test regularly and write it down. Print this, keep it by the tank, and log your readings — trends in alkalinity, salinity and nutrients jump out fast, long before they become a crash.

Black & white saves ink and prints cleanly on any printer.
Coralkin honest saltwater & reef care · coralkin.com
Reef Parameter & Maintenance Log

Reminders: read salinity on a refractometer (not a swing-arm hydrometer) · top up evaporation with fresh RO/DI, never saltwater · alkalinity is the one to watch for swings · nitrate & phosphate should be low, not zero. Targets are on the parameter chart.

DateSalinity
(SG/ppt)		TempAlk
(dKH)		CaMgNO₃PO₄Notes / dose / WC