I will most likely upgrade in a few years time if I’m honest so that shouldn’t be an issue hopefully. Also if I were to raise a Midas with 2 Oscars from a very young age would they be able to co-exist? (Sorry for asking so many questions aha)More likely to work than the jardini from what I have read, the Asians are supposed to be less aggressive. I have never kept an Asian, can't personally verify that. I do think a 180 is going to eventually be too small for any arowana species. Though it should work for a good while, if you can upgrade at some point to more like a 300.