Your aquarium,
measured.
Tank volume, water-change amounts, substrate and a care record.
Filled water heightBefore displacement
Proportional drawing
Tank water volume
Measure internally, up to the intended waterline. The air gap is excluded. Substrate and hardscape displacement are not deducted.
60 × 30 × 30 cm ÷ 1,000. Capacity before displacement.
Inches, round tanks and both gallon units ↗
Use an appropriate measured working volume for treatments or precise husbandry decisions.
working water volumeArithmetic only
No routine prescribed
Water-change amount
You choose the share appropriate for your aquarium. This tool calculates an amount; it does not recommend a routine or emergency treatment.
25% of 60 L. Editable arithmetic example.
Prepare replacement water for the species and your water supply. A large sudden change in a long-neglected tank needs careful advice.
Shape the bed.
Compare the bags.
Flat or sloped beds, optional product density, whole bags, known costs and a shopping brief you can keep.
The little things.
Kept together.
Check a task when you have done it. Download the dated list to keep your checks; this page's checks last for this visit.
Keep a dated care logVolume: internal centimeters multiplied, divided by 1,000.
Change amount: working liters × chosen percentage ÷ 100.