The best way to proactively prevent disease is to give your Cardinal Tetra the proper environment and a well-balanced diet. The more closely their environment resembles their natural habitat, the less stress the fish will have, making them healthier and happier. Stressed fish are more likely to acquire disease. Anything you add to your tank can introduce disease. Not only other fish but plants, substrate, and decorations can harbor bacteria. Take great care and make sure to properly clean or quarantine anything that you add to an established tank so as not to upset the balance. It is recommended to read up on the common tank diseases. Knowing the signs and catching and treating them early makes a huge difference. For information about freshwater fish diseases and illnesses, see .
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Hi Dennis, I have a new 64ltr aquarium, we introduced 3 neon tetras and 3 harlequins on 13th and they seem happy. This morning one of the tetrss was missing so checked tank it seems that it got caught in the filter and died. Is there any way to prevent this happening and us there anything I need to do yo the water when a fish dies?
I have no plants or pump are these necessary in a tropical aquarium?
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I have 15 neons, they all have swollen bellies I noticed today! They seem happy and full of colour, eating well and exploring the tank. I presumed maybe holding eggs but this tetra disease has me worried. Never lost a single neon from day I brought them, and I’ve raised a paltie fry so my water cannot be bad otherwise the fry would have died… how do I tell females and males apart?
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