Water changes
Record routines, plan the next change and see what is coming up.
Aquarium care,
made simple.
Track water changes, water parameters, livestock, equipment and maintenance across all your aquariums — all in one place.
Available for iPhone, iPad and Android
Know what needs doing.
Understand how your tank is tracking.
From the next water change to the latest nitrate reading, WaterChange brings the work and the story of every aquarium together.
Water testing
Log relevant parameters with units and tank-specific target ranges.
Livestock
Keep photos, quantities, dates, costs and notes with the right tank.
Equipment
Remember every filter, light, heater, pump and piece of gear.
Maintenance
Schedule recurring care and review completed maintenance history.
Readings become
useful Tank Insights.
WaterChange compares the latest usable readings with ranges that apply to your aquarium type.
pHTarget 8.1–8.38.2
AmmoniaTarget 0.00–0.00 ppm0 ppm
SalinityTarget 32.0–35.0 ppt35 ppt
PhosphateTarget 0.01–0.03 ppm0.02 ppm
CalciumTarget 380–450 ppm420 ppm
MagnesiumTarget 1200–1400 ppm1200 ppm
AlkalinityTarget 8.0–12.0 dKH8 dKH
NitrateTarget 1.0–10.0 ppm12 ppm
See how your water changes over time.
Real test history becomes readable parameter trends. Gaps stay gaps, so an unrecorded result is never mistaken for zero.
Built to grow with your collection.
Organise tanks by room, search and select aquariums, then record the same water-change routine once. WaterChange saves a separate record to every selected tank.
FreshwaterSaltwaterReefBrackishPlanted
Thoughtfully designed for every screen.
A compact iPhone experience, a dedicated iPad layout and a consistent native Android edition.
Know what needs doing.
Know when. Know why.
Bring every water change, test result and piece of aquarium care into one beautifully simple place.