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fish died

  1. Help? water temperature is lowering and one fish has died already!!

    Beginner Freshwater Aquarium
    My fish was swimming like spastic this morning then he just sunk down to the bottom of the tank, he didn't move for about 10 mins and he later on started swimming which I thought he was okay. I check on him few times through out the day and had notice that's he was swimming close to the bottom...
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