I like the fact that you touched on their personalities, because they really are interesting. All of mine in the past used to nibble on my fingers when I put my hand in the tank.
Also, they are definitely hardy - once, when I bought a new one at the pet store, the bag popped in the employee's hand and the loach fell to the floor and under a cabinet. I got him out and took him home and he's healthy to this day. Great fish.
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