No. Not only are they very active swimmers, they also are poopy and foul the water quickly. The bigger the tank, the more water to dilute the poop. Pufferpedia says a minimum of 15 gallons. I keep mine in a 20 gallon and IMO, it's a bit on the small side.Can a Figure 8 puffer live well and happily in a 10 gallon tank? Thank you!
If it's a 20 long, it will have considerable difference....A 20 gallon doesn't have much of a difference in space to 10 gallon. It's mostly height that is different. And with Petco's $ per gallon sale, a 20 gallon would only be $10 more.