# Build a home for an ambush artist Species: Tetraodon miurus (Congo / potato puffer) Canonical page: https://taterpuffer.com/tank-setup/ Publisher: Tater Puffer editorial Updated: 2026-10-12 ## What tank does a potato puffer need? Plan a broad aquarium for one Tetraodon miurus, with at least an 80 × 35 cm footprint and roughly 112 L / 30 US gallons as a minimum planning reference. A larger, wider setup is preferable. Provide soft sand, secure cover, mature filtration, a lid and oxygen-rich water with sheltered resting areas. ## Give the floor space priority For one adult, plan a broad aquarium with a footprint of at least 80 × 35 cm (roughly 31.5 × 14 inches), around 112 L / 30 US gallons. A larger, wider aquarium is preferable; a 40-gallon breeder offers useful floor area. Volume alone is not enough: a narrow, tall tank is a poor substitute for a wide sandy bottom. This is a minimum planning reference, not a guarantee that every 30-gallon tank is suitable. ## Make sand non-negotiable Use smooth, inert aquarium sand, fine enough for the fish to bury without scraping its skin. Rinse it before use. Aim for about 2–5 cm (1–2 inches) in general areas, with deeper burying zones as needed for the fish’s body depth. Avoid gravel, sharp grains and exposed plant soil. Keep a broad open patch of sand visible at the front. ## Arrange secure retreats Use smooth rocks and aquarium-safe driftwood to provide cover at the back and sides. Set heavy rocks securely on the tank base before adding sand so a digging fish cannot undermine them. Leave enough room to turn and bury. Attach hardy plants such as Java fern or Anubias to wood or rock. Keep lights moderate and provide shaded areas. ## Filter for waste, circulate for oxygen Use a mature biological filter with ample media and mechanical filtration. Strong surface agitation supports gas exchange; an air stone can help. Provide circulation across the tank while leaving sheltered resting spots where the fish is not buffeted. Guard filter intakes and powerheads. Clean mechanical media before it clogs, and never replace all biological media at once. ## Protect the fish from equipment Fit a secure lid and close gaps around hoses. Use a heater guard where the fish can rest against the heater, and position a separate thermometer where it is easy to read. Secure equipment and keep electrical connections above possible splashes. Keep a test kit, dechlorinator, bucket and siphon dedicated to aquarium use. ## Cycle before arrival Do a fishless cycle. Confirm the aquarium can process an appropriate ammonia dose to zero ammonia and zero nitrite within 24 hours, following the cycling product’s instructions. Test again before stocking and reduce nitrate with a water change. A clear tank or a filter that has run for a week is not proof of a finished cycle. Keep the filter fed until the fish arrives. ## Setup checklist Before bringing the fish home: verify the species; finish the cycle; confirm temperature and water chemistry; fit lid and guards; prepare suitable foods and feeding tongs; arrange a cycled quarantine option; and identify an aquatic veterinarian. Keep the display aquarium for this fish alone. ## Common questions ### Can I keep a potato puffer in a 20-gallon tank? A 20-gallon tank is below this guide’s adult planning minimum. Choose a broad permanent aquarium with adequate floor area and water stability rather than relying on the fish’s sedentary habits. ### Do potato puffers need aquarium plants? Plants are optional. Soft sand, clean oxygenated water and secure cover are the priorities. Hardy plants attached to wood or rock can add shelter without being uprooted as easily. ### Does a potato puffer need a heater? It needs stable water within its suitable temperature range. In most homes a thermostat-controlled aquarium heater is needed; use a guard and a separate thermometer. ### How long does it take to cycle a potato puffer tank? There is no reliable fixed number of days. The aquarium is ready only after testing shows the biological filter can process the cycling product’s specified ammonia dose to zero ammonia and zero nitrite within 24 hours. A clear tank or a filter running for a week is not proof; confirm the result again before the fish arrives. ## Related guides - [The right sand for a potato puffer](https://taterpuffer.com/sand-and-substrate/guide.md) - [Clean, stable freshwater](https://taterpuffer.com/water-quality/guide.md) - [Your first month with a potato puffer](https://taterpuffer.com/first-month/guide.md) Resource links: https://www.petzonesd.com/congo-puffer-tetraodon-miurus/ and https://puffercentral.com/products/congo-potato-puffer Educational care guidance; aquatic veterinary advice is required for illness and treatment.