07-01-2011, 03:53 PM
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not for puffers, to my understanding, 1 puffer needs 5 gallons, and every puffer in addition to that one needs 3 gallons more. The fish are territorial and part of their behavior is to patrol a certain amount of space, limiting that can cause additional stress to the fish. Also puffers are really messy, mine sometimes takes a bit out of a snail and then leaves the rest to rot and pollute the water.