Aquarium Filter Calculator
Find the Right Filter for Your Tank
Enter your aquarium's dimensions and we'll recommend the best-matched filters from our range, based on the ideal 4–6× per-hour turnover rule.
Volume shown is gross tank size; actual water is usually ~85–90% once substrate and décor are added. For messy fish (goldfish, cichlids) size up; for bettas and shrimp prefer a gentle sponge filter. Browse all filters →