Aquarium & Fish

Aquarium and fish, compared by tank, equipment, and care: tanks, fish food, filters, heaters, lights, plants, beginner tanks, betta tanks, test kits, substrate, and budget tanks. Start with the best aquariums overall, then narrow by your tank and fish.

Deciding factors

Size: 20 to 30 gallons for beginners, larger is more stable. Filtration: mechanical, biological, and chemical, run continuously. Cycling: 4 to 6 weeks before fish, testing ammonia, nitrite, and nitrate. Maintenance: weekly partial water changes.

All Aquarium guides

Guides appear in the live site only on or after their publish date, via the dripfeed build. The full list above is the source list for this batch.