Tank Log: Aquarium Tracker

Tank Log is an aquarium and fish tank tracker for water testing and care. Log your water parameters in seconds, see every reading against safe ranges for your tank, and know exactly what to do next.

Made for freshwater, planted, shrimp, reef and saltwater aquarium keepers, from a first nano tank to a mixed reef.

LOG WATER TESTS IN SECONDS
• A fast keypad steps through each water test, one parameter at a time
• Track temperature, pH, ammonia, nitrite, nitrate, phosphate, KH, GH, TDS, salinity, alkalinity, calcium and magnesium
• Safe water parameters set up for reef, marine, planted, community, coldwater, shrimp and quarantine tanks, and you can fine-tune them for your fish tank

SPOT WATER QUALITY PROBLEMS EARLY
• Every reading checked against its safe range
• A warning when a parameter is drifting toward the edge, before it becomes a problem
• Sudden swings flagged, and toxic free ammonia worked out from your pH and temperature
• A health score for every tank, plus a clear list of what needs attention, most important first

NEVER MISS A WATER CHANGE
• A water change plan sized to your aquarium, in litres or gallons
• Reminders for water changes, water tests, filter care and feeding
• Mark a task done straight from the notification

STOCK YOUR FISH TANK WITH CONFIDENCE
• More than 100 fish, shrimp, snails and corals, each with a care sheet
• A compatibility check against your water, tank size, readings and current livestock
• See how much each new fish adds to your tank's bioload
• Add your own species

SEE YOUR WATER PARAMETER TRENDS
• Charts for every parameter with the safe range marked
• Safe ranges and advice drawn from published aquarium husbandry guidance, with sources in the app

PRIVATE BY DESIGN
No account, no ads and no tracking. Your aquarium data stays on your device.

TANK LOG PRO
• Unlimited tanks and livestock
• A full year of trends with a forecast
• Smart reminders: retest alerts, drift warnings and testing nudges
• Your own care tasks, at the times you choose
• Home screen widgets
• Backup export and import
• Five colour themes, each with a matching app icon