The biggest porcupine puffer I've seen in captivity was probably around 15 inches. That being said, I wouldn't want to put one into a tank anything less than 150 gallons. Minimum tank sizes are just that, minimum. They don't take into consideration other fish in the tank. They need a good amount of room for turning around and exploring. If given enough space they should grow to be full sized and live a very long happy life.
I agree with what mandy said, put a ruler in your tank and think about how much space you will need. Puffers aren't just long they are very wide too. And porcupine puffers are probably the most common puffer to just puff for practice and you would have to make sure there is sufficient room for puffing.
A large porcupine puffer in a 90 gallon would create way too much waste. That is another reason for large tanks for puffers, they are messy eaters and have a big bioload. I also assume you would want more fish in there than just a puffer which would also add to the problem.
I agree with what mandy said, put a ruler in your tank and think about how much space you will need. Puffers aren't just long they are very wide too. And porcupine puffers are probably the most common puffer to just puff for practice and you would have to make sure there is sufficient room for puffing.
A large porcupine puffer in a 90 gallon would create way too much waste. That is another reason for large tanks for puffers, they are messy eaters and have a big bioload. I also assume you would want more fish in there than just a puffer which would also add to the problem.
