Part of your problem is you have a very small tank which is marginal at best for one.. Remove one.
How large a tank is needed? I have two bipartius and one ornata (at least it was sold as ornata....it looks like a meleagris to me) in quarantine. I intended to put them in a 150 gallon tank.They are small now. In the 1 1/2 to 2 inch range. Will this be a problem? snorvich, evolved or anyone else with experience.