Watch those water parameters......I might be paranoid but that sounds pretty new pretty fast......This is what I meant by be prepared......should have set the tank up prior to oredering....Oh well It'll probobly be just fine.
Trev seems to have some overly aggressive fish.......Mine doesn't bother any of the fish it's currently housed with. I have mine in with a 5 inch Pink Tailed Chelceus and he's only had a tattered tail once.....keep in mind this is a slender silvery fish which by all accounts "should" have been tormented relentlessly by now. Just goes to show you everyone has different experiences.....asside from the occasional charge or rush towards the redtails mine even schools with them. One of my Rhaphs is a lil smaller than the Armatus and it isn't even bothered despite being VERY silvery. I think it helps to get them very small...my Armatus has been with these other fish since it was barely big enough to not be a meal.