Aquarium Water Change Calculator
Calculate how much water to remove and replace during your next aquarium water change.
1. How large is your aquarium?
2. How much water are you changing?
WATER TO REMOVE & REPLACE
15
L
25%
WATER CHANGE
45 L
WATER REMAINING
4.0
US GALLONS
🪣 Easy bucket guide
10 L bucket
1.5 buckets
15 L bucket
1.0 buckets
20 L bucket
0.8 buckets
A 25% water change means removing approximately
15 litres and replacing it with 15 litres of
appropriately prepared water.
💡 Remember:
Always treat replacement tap water appropriately
for your aquarium. Try to match the new water's
temperature and avoid making sudden changes to
important water parameters.