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413 Posts
When you say tank parameters "haven't changed drastically" what does that mean? What HAS changed?
IME tetras can live a very, very long time in a stable tank, but they can be VERY sensitive to changes- especially in water parameter changes. Temperature, ammonia, nitrite, and hardness fluctuations especially will take a toll.
IME tetras can live a very, very long time in a stable tank, but they can be VERY sensitive to changes- especially in water parameter changes. Temperature, ammonia, nitrite, and hardness fluctuations especially will take a toll.
