Cardinal Tetras are not exceptionally difficult to care for provided their water is kept very clean. Aquariums are closed systems and regardless of size, all need some maintenance. With home aquariums, the nitrates and phosphates build up over time, and water hardness increases due to evaporation. To combat these ever-changing conditions, water should be replaced on a regular basis. At least 25 to 50% of the tank water should be replaced every other week, especially if the tank is densely stocked.
Blind Cave Tetra Care Guide | The Aquarium Guide
There are countless species of tetra. The most common aquarium additions include Neon Tetra, Cardinal Tetra, Penguin Tetra, Harlequin Tetra, Rummynose Tetra, Glowlight Tetra, Ember Tetra & Glowlight Tetra. These species have excellent colorations, lively personalities and are less sensitive to water conditions than other fish. They have a maximum size of 2" and can live up to 10 years in captivity if properly cared for.
Tetra Products | Pond, Aquarium, Water Care, Equipment
On average, black skirt tetras live for three years in a home aquarium. But if they are well cared for and provided with a spacious tank, it’s not unusual for them to see their fifth birthday. There are reports of them living much longer, but in my experience anything beyond five years is rare.
Cardinal Tetra Care Guide | The Aquarium Guide
Tetras are very easy to care for and can be housed with almost any other non-agressive species. The small size and nature of Tetra fish often means they will school together in the aquarium. This is a desirable trait in freshwater species and can add a brilliant effect to any large aquarium.If it is well taken care of in a home aquarium, it can live up to 10 years, though 5 years is a more common life span. The one thing that most often causes a shortened life span in neon tetras, is the dreaded “neon tetra disease”. It manifests itself as lumps on the body, fading colors and trouble swimming. This disease is usually fatal, and any newly purchased neon tetras should be quarantined before you add them to a tank that has healthy neon tetras.