i'm looking to getting rays within a year, only so long because i'd want the tank well cycled. i'm planning a 180, i know not big enough for most full grown rays but it will last a couple years, plan on stocking it with Black arowannas, if i can find them again, some knifefish, i like the idea of some large black ghost, just want to know what species, where would you advise i get them from and what filter setup you would use on a tank this size from people with ray experience. i've had a decent size tank before a 240, 180, 2-120's, and a ton of random tanks used as breeders. i just always been into rays just never would make the commit to buy because i wasnt stable but now i am and would like to commit. any advice is appriciate but great advice wanted lol.