i have a 180 and im planning a ray in the near future...now i know rays require lots of filteration and the right substrate...but how about other fish??...i have silver aro and 2 pacu's...the pacu's are going in a pond and the silver would stay...might trow in some cichla down the road....would this be ok"??....ive seen plenty of tanks with both ray and fish with no problem...and since the aro is always up top i think it would even be less of a problem...??...also the tank has pool sand right now as substrate...would this be ok..?..?...tank has a sump and dual over flow's but i think i might add a fx5...so what do u guys think???..get the ray or no??...i really like em...just a lil scared since it would be my first