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So I'm down to only one dwarf puffer now. He's in a 5.5G by himself. Is it ok to just leave him as the only fish in there, or should I get a buddy for him. Another DP, or perhaps something else?

What do you guys think.

You could do either. Puffers seem to do alone fine. You could put one more in a 5.5gal.

Kim

I'm not sure what else you could put in a 5.5g with a puffer other than a pair of otos. Maybe another one is your best bet.

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There is water at the bottom of the ocean

I wouldn't put 2 puffers. The more dominant one will keep the other 1 hiding. I would add otos or dwarf cories.

The more dominant one will keep the other 1 hiding

Would that happen even if it was a M/F pair?

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There is water at the bottom of the ocean

I recently took down my 20 gallon community aquarium. When I first put it up I had 2 dwarf puffers and they seemed to get along OK. In literally a weeks time the slighty bigger one was always chacing the smaller one away. As this continued he also became very sick do to what seemed to be stress and not eating. When it was just the single puffer left he seemed much happier too.

My recommendation would be to keep just the one. The 20 gallon tank was heavily planted and had glowlight tetras, silver hatchetfish, leopard cories, two otos, and tons of pesky pond snails. My puffer always had a lot going on in his tank and he was always very responsive to his environment. Most of all he loved hunting snails.

Why are they dying?

Ha! ooops! None of my fish were/are dying, only the passive puffer that got picked on.

I believe it doesn't matter if it's male/female. I had 2 males and 1 female. The female was the dominant one and the other 2 were always hiding.

I had 3 dwarf puffers in a 5.5 gallon tank once. And the more dominate one killed the other 2 . I would just stay with one. You dont want to chance the one you have getting killed/the new one getting killed
-kristin

~!!I lOve LiFe!!~