Water Change Scheduler

Calculate optimal water change frequency and volume for your aquarium.

Tank Type*

0.5x1x2x3x
Current: 1x per day

What You'll Get

Percentage to change per session
Exact volume in gallons/liters
Optimal change frequency
Tailored to your tank's bioload and setup

Disclaimer: This calculator provides general guidelines based on aquarium maintenance best practices. Always monitor your water parameters and adjust as needed for your specific setup.

Consult local water quality reports and test your source water regularly.

Aquarium Care

Master Your Aquarium's Water Changes

The complete guide to maintaining crystal-clear, healthy water for your fish and corals. Get personalized schedules for freshwater, brackish, and reef aquariums.

Things You Need to Know

Master the art and science of aquarium water changes

Why Water Changes Matter

Water changes are the foundation of aquarium health. They remove toxic waste compounds, replenish essential minerals, and maintain stable water chemistry that keeps your aquatic life thriving.

Removes nitratesStabilizes pHPrevents disease

Optimal Schedules by Tank Type

Freshwater:10-30% weekly
Brackish:15-25% weekly
Adjust based on species and salinity needs.
Reef:10-20% bi-weekly
Keep nitrates ~0–10 ppm; nano reefs often need smaller, more frequent changes and testing.

Common Questions Answered

Get expert answers to the most frequently asked questions

Ready to Master Your Water Changes?

Join thousands of successful aquarists who've transformed their tanks with our personalized water change calculator. Get your custom schedule now!

Personalized schedules
Expert recommendations
100% free forever