Dwarf Pea Puffer

Relying on a heater without a thermometer

Dwarf Pea Puffer needs 74–82°F. Heaters malfunction or drift over time — always use a separate thermometer to verify. Temperature swings of even 3–4°F can trigger stress and disease, particularly ich.

Putting them in a tank under 5 gallons

While 5 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (10 gal) is much more forgiving.

Housing with peaceful nano fish

Dwarf Pea Puffer is semi-aggressive and territorial — small, peaceful species like neon tetras, endlers, or celestial pearl danios will be stressed, bullied, or eaten. Choose tank mates that can hold their own.

Pairing with bettas, angelfish, or fancy guppies

Dwarf Pea Puffer is a known fin-nipper. Long-finned fish are irresistible targets — their flowing fins trigger nipping behavior that causes stress, infection, and fin rot in the victim.