How is everyones fish?

Are dwarf gourami aggressive? My gourami started to get nippish.

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my dwarf gourami
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I am in trouble. I don't know what tank mate my skirt tetra would approve of. I heard they can be very aggressive ! Any ideas? I have a 10 gallon tank

Well, the fish I showed earlier died today so i got an upside down catfish and 4 neon tetras

I am worried about tang, my small goldfish. she has a thin black line on her tail fin. Is it fin rot?

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One of my new fish.
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