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  1. Neurotic guppies

    Beginner Freshwater Aquarium
    Howdy I'm a returning aquariumist, so I feel like a noob again. I have a 5 gal tank w/ 6 guppies. While they seem very active, feeding well, interested in their surroundings, a couple appear neurotic. They swim up and down along the leading vertical edge of the tank in several laps until they...