My gourami was okay when I first got him. I've only had him for a 3 weeks, I think. I realized he had that spot a couple days ago, but it was small and I went away for 2 or 3 days. My parents were feeding them and I just checked up on them the morning after I got back and realized it was three times the size it was before.

Can anyone tell me why he has that?

I also have a blue dwarf gourami in the same tank and about 7 neon tetras. I had a big rock in the middle of my tank, but took it out and all my decorations I have in the tank at the moment are flexible. I only have a small rock cave in there. I don't know if any of that information will help.

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  • 2
    Welcome to Pets! I don’t know enough about these fish to help, but can you add the following to your question to help get the right answer: tank size, temperature, filtration setup, water change routine, and parameters (pH, ammonia, nitrites, nitrates). The setup of an aquarium often helps narrow down issues with fish health. Thanks!
    – Gwendolyn
    Jul 28 at 0:52

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