If well fed, and ample swimming space is provided they'll definately hit 10". I'd scratch the puffer and angler. The angler is best suited for a species tank, as the puffer and Trigger would most definately be tempted to get nippy on the anglers hide. My friend has a 14" stars and stripes in a 240 {which is an 8' tank}, and even in that tank he looks huge. A 90 would be only good as a QT, for a big boy like this.