Ember Tetra
Max size 0.75". Orange-red. School of 10+ fits in 10 gallons. Beginner friendly.
Eats standard flake food, peaceful, coloration improves in soft water.
Green Neon Tetra
Max 1". Iridescent green-blue body. Smaller cousin of regular neon.
Needs soft water (pH 5.5-6.5). Very sensitive to water quality — advanced beginners only.
Dwarf Rasbora (technically not tetra)
Chili rasbora, phoenix rasbora, dwarf emerald rasbora. All 0.5-0.75".
Often sold alongside tetras. Peaceful nano schoolers.
Strawberry Rasbora
Max 0.75". Bright red-pink body. Recent imports have gained popularity.
Very soft acidic water required (pH under 6.5).