Perhaps I'll move him in with my Marmorkrebs then. They're a non-aggressive crayfish and he's more than welcome to eat their never-ending broods if he seems interested in doing so. And they already live in an unheated tank, which is usually between the high 50's to high 60's (good temperature range or no?).
If I get him some more friends, will they have to be the same size? I've never seen a loach this big at any of my LFS before. And on the websites (like liveaquaria, petsolutions, etc) they all seem to be shipping them at the 2-4" range. Oh and will coloration matter to him? I'm seeing more of the "golden dojos" for sale than ones with the coloration like mine.