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  1. Are my tetras stressed?

    Beginner Freshwater Aquarium
    Hi, I just set up my first real aquarium last week and put my fish in last night. They seem to be doing great, but I worry about their numbers. I purchased three black skirts and three red belly x-ray tetras. They are close to the same size, and they are in a 15 gallon tank. When I first put...