Calculator
How many GPH filtration do I need?
Free filter sizing calculator. Enter tank volume + tank type (community, planted, reef, predator) and get target gallons-per-hour for proper turnover.
Inputs
Enter values + click Calculate.
How it works
Step 1Community FW: 4-6x tank volume per hour
Step 2Planted: 5-7x; reef: 20-50x (return + powerheads combined)
Step 3Subtract 30-40% from rated GPH for media + head loss