Blue Kerri Tetra

Blue Kerri Tetra (Inpaichthys kerri)

Appearance & Behavior

Bring shimmering blue-violet color and lively movement to your freshwater aquarium with Blue Kerri Tetras. A dark horizontal stripe contrasts with their iridescent bodies, with mature males typically developing stronger blue tones and females showing softer coloration. A settled group creates a striking display among green plants. These social fish are generally peaceful, though males may display and chase one another, and occasional fin-nipping can occur.

Quick Care Guide

• Care Level: Easy to moderate; best in an established aquarium

• Temperament: Generally peaceful and active; may chase or occasionally nip fins

• Adult Size: Approximately 1.5–2 inches

• Minimum Aquarium Size: 20 gallons recommended for a group and comfortable swimming space

• Temperature: 75–81°F

• pH: 5.5–7.0

• Water Hardness: Soft water preferred, approximately 2–12 dGH

• Diet: Omnivore

• Swimming Area: Middle to upper

• Recommended Quantity: At least 6; preferably 8–10 or more when aquarium space and stocking allow

Aquarium Setup & Compatibility

Provide planted edges, shaded retreats, and open swimming space. Blue Kerri Tetras do best in a fully cycled aquarium with stable water conditions and gentle to moderate circulation. Plants, driftwood, and floating cover help them feel secure and break lines of sight between displaying males. A darker background can highlight their blue sheen. Use a secure lid and avoid abrupt changes in temperature or water chemistry.

Good companions include similarly sized peaceful tetras, suitable rasboras, and Corydoras species with compatible care requirements. Plant-safe snails and adult dwarf shrimp may coexist, though tiny shrimplets can be eaten. Avoid aggressive fish, larger predators, and very timid fish that may be outcompeted for food. Slow-moving or long-finned fish are less suitable because occasional fin-nipping can occur. Monitor the group for persistent chasing or fin damage, especially in crowded aquariums or small groups.

Feeding

Feed Hatchery Diet 1.2 mm, supplemented with Daphnia and Bloodworms. Crush pellets or cut larger bloodworms into smaller pieces as needed to fit their mouths. Offer small portions across more than one feeding spot so less dominant fish have a chance to eat.