Reef Tank Water Testing Logbook
A focused worksheet pack for reef keepers who want clean records on test day: parameters, water changes, dosing, livestock notes, and problem-solving follow-through.
Weekly test sheet
Reef Parameters
| Parameter | Target | Reading | Action |
|---|---|---|---|
| Alkalinity | 8.0-9.0 dKH | ____ | ____ |
| Calcium | 420-460 ppm | ____ | ____ |
| Magnesium | 1280-1400 ppm | ____ | ____ |
| Nitrate | 2-15 ppm | ____ | ____ |
| Phosphate | 0.03-0.10 ppm | ____ | ____ |
Target ranges, logs, dosing, and review sheets.
Alk, Ca, Mg, nitrate, phosphate, salinity, and more.
Stripe redirects to the printable download page.
What is included
The pack is structured around the records reef keepers actually need when a tank starts drifting or a coral changes behavior.
Water testing log
Track core reef parameters, test kit notes, confidence flags, and next actions across weekly testing.
Maintenance tracker
Record water changes, filter swaps, skimmer cleaning, equipment checks, and recurring service dates.
Dosing notes
Capture dosing changes, observed parameter response, and the reason for each adjustment.
Livestock watchlist
Keep coral, fish, and invertebrate health notes close to the water-quality records that explain them.
Buy once, print whenever you need a fresh sheet.
Use the printable logbook as a paper backup, a tank-room clipboard, or a structured handoff sheet when someone else is watching the aquarium.
Questions
Is this a printable PDF?
Yes. The download page is formatted for printing or saving as a PDF from the browser.
Does this replace the My Reef Log app?
No. The logbook is a printable companion for reef keepers who want paper records, a quick test-day sheet, or a backup alongside the digital tracker.
What parameters does the logbook support?
It includes space for alkalinity, calcium, magnesium, nitrate, phosphate, pH, salinity, temperature, ammonia, nitrite, and custom notes.