Ruby Tetra (Axelrodia riesei)

Often our customers are looking for a no‑nonsense, no‑fuss schooling fish to add to their planted aquatic wonderland, particularly in fancier aquascaped setups, and the Ruby Tetra (Axelrodia riesei) is perfectly suited to this purpose. The goal is usually to add natural movement to the aquarium while allowing the plants, hardscape, and overall design to remain the visual focus. Their small, compact size allows them to inhabit the mid to upper water column without overwhelming the space, and their gentle temperament ensures they will not disturb other carefully selected aquarium species. The subtle, soft pink‑ruby hue of these fish adds a touch of color without drawing attention away from the carefully designed plants and background, creating a cohesive, balanced aesthetic that makes a tank feel alive and dynamic.

Ruby Tetras are social by nature, and their best qualities are revealed when they are kept in schools of six or more individuals. Within a group they exhibit tight, coordinated movements that can be mesmerizing, giving the appearance of a single, fluid entity darting gracefully among plants and decor. Their peaceful temperament makes them compatible with other small, non-aggressive species, such as small rasboras, tetras, or dwarf cichlids, allowing aquarists to create diverse but harmonious community tanks. The males display slightly brighter and more intense coloring than the females, but the differences are subtle, which contributes to the overall visual appeal of the group as a whole. These fish are most comfortable in planted aquariums that offer plenty of cover and hiding spots, such as dense background foliage or small caves, which replicate the natural conditions they would seek out in the wild.

Proper care for Ruby Tetras is straightforward but benefits from attention to environmental stability. They thrive in soft to moderately acidic water with a gentle flow, which mirrors the conditions of their natural habitats. A slightly darker substrate enhances the contrast of their soft ruby tones and helps the fish feel more secure, encouraging natural behaviors such as schooling and exploration. Although they are hardy fish, maintaining stable water parameters and a regular feeding routine brings out their best coloration and behavior. They are active swimmers, often exploring the tank with short, darting movements that add life and motion without becoming disruptive. These qualities make them ideal for aquascaped setups where motion and subtle coloration are desired rather than loud or aggressive displays. Ruby Tetras are a reliable, visually appealing choice for aquarists of all experience levels, combining ease of care, peaceful behavior, and elegant, understated beauty. These fish do not ship individually bagged.

Common Name:  Ruby Tetra
Scientific Name:  Axelrodia riesei
Country of Import:  Colombia
Prophylactic Treatment:  Erythromycin / Ich-X / Metro
Approximate Current Size:  .75″-1″
Temp/pH/TDS:  75F / 6.5 pH / 80

Please be aware that all fish are sold on a BUY THIS WEEK, SHIP NEXT WEEK basis, and fish are shipped only on Monday, Tuesday and Wednesday. Weekly shipping cutoff is EVERY SATURDAY at 12 Noon Pacific US Time. All fish are shipped via Overnight Air/Next Day Air. Minimum order is $50.00 (excluding shipping) and all orders to the lower 48 US States qualify for FLAT RATE $60.00 shipping via Overnight Air/Next Day Air. Hawaii and Alaska State Residents: Please contact us if you would like to purchase Live Animals for delivery.

When you place your order, you will be required to agree to our Terms & Conditions of Sale.