Here we go again: MIs, Take III

[Samw]

Originally Posted by Aquattro

MI Update: As (sort of) expected, keeping two doesn't work. The bigger one has now pinned the smaller one in the back cave, and I'll now have to catch and rehome one of them. Too bad.

That's a good sign. It means they are now outgrowing your tank in the sense that they are defining territory and the large one has marked the whole tank as its territory. Actually, I'm only surprised they didn't start fighting sooner. The fishes must have gained quite a lot of mass since you first bought them. No surprise to me.