I caught 4 little fish from a pond today and i put them in my aquarium that has no fish in it. What kind of stuff would they like in there? And do they need an filter? And What are these? They are kinda long, silver, and have a black line going across their body. They also got some red and yellow on their fins. They are about 5 inches long.
What kind of stuff do pond fish like in a aquarium?
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