Fish4life Posted December 2, 2023 Report Share Posted December 2, 2023 2 days ago I found out that one of my neon tetras was missing an eye but today when I was watching them eat I saw that another of my neon tetras now lost and eye. i had just got my tank on the 16/11/2023 and am new to the concept of caring for fish. I have 14 neon tetras in the tank, two glowlight tetras and 3 bristlenose catfish. Can someone explain why my 2 neon tetras lost there eyes and if there is a way to prevent it thanks Quote Link to comment Share on other sites More sharing options...
Caryl Posted December 8, 2023 Report Share Posted December 8, 2023 Welcome to the forums! Have you tested the water pH, nitrates and nitrites? Neons are very sensitive to water conditions and I suspect adding them to a new tank is the problem as they need a well established tank. Have you read about cycling and how important it is? I always cycled a tank with guppies or any hardy fish a similar size. If I had a 2ft tank, I would start with 4 guppies, wait 1 month then add another 4 and repeat until the required stocking level was reached. Never lost a fish as this method built up the good bacteria to match the fish numbers. A 3ft tank I would start with 6 guppy sized fish and repeat as above. A 4ft tank got 8 guppy sized fish. Quote Link to comment Share on other sites More sharing options...
Fish4life Posted December 13, 2023 Author Report Share Posted December 13, 2023 okay! i have a pH test but not a ammonia and nitrates and nitrites test, luckily no other fish has lost their eyes Quote Link to comment Share on other sites More sharing options...
Caryl Posted December 14, 2023 Report Share Posted December 14, 2023 As time goes by and the tank continues to cycle, you may be fine as it balances. The nitrites and nitrates are more important than the pH. Good luck with your fish keeping and don't hesitate to ask questions 🙂 Quote Link to comment Share on other sites More sharing options...
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