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  1. We want to add another fish!! HELP!

    Betta Fish Compatibility
    My boyfriend and I have a crowntail in 1.5 gallons with a filter system and we are soon adding a heater. It's a nice little aquarium, surely he's much happier than in a stupid cup with 2 inches of filthy water to sit in. :/ Anyways, we were wondering if adding a bottom feeder would be safe...