u/Flying_Gabe201

Recently bought 3 Ranitomeya Ventrimaculata around a month and a half ago. They are currenly in a 30x30x45cm viv. They seem to be eating well, they are nice and round, while one is slightly bigger than the other 3. I noticed the bigger one started calling a few days ago and hanging around one of the other 2 frogs constantly, then today i saw him following around the other frog around. is this territorial behaviour? What should i do?