Complete Goldfish Filter Guide — Choosing the Right Filtration System
Choosing the best filter for goldfish tanks: comparing internal, HOB, canister, and sponge filters with tank size recommendations.
Key Takeaways
Choosing the best filter for goldfish tanks: comparing internal, HOB, canister, and sponge filters with tank size recommendations.
Choosing the right filter is a critical decision that directly affects goldfish health and maintenance effort. Goldfish produce more waste than most ornamental fish, putting heavy demands on filtration.
Internal Filters (Suisaku Eight, etc.)
Affordable, easy to install, and provide aeration. Good for small tanks under 30cm or fry tanks. Limited filtration capacity for larger setups. Clean sponges in tank water every 2-4 weeks.
Hang-on-Back Filters (HOB)
Most popular among goldfish keepers. High filtration with easy top-access maintenance. Excellent mechanical and biological filtration. Covers tank top, limiting lighting options. GEX Grande Custom is a popular 60cm tank choice.