hey im looking to build a 8x4x4 foot aquarium in the future and i have chosen some asian aros and a Leopoldi stingray as tank mates. i was looking for a few other fish to go in with them. the tank is almost 1000 gallons when full. so when the water level is down about 4 inches (for head clearance for the fish when feeding) it is about 900 gallons. any suggestions on large freshwater fish are greatly appreciated!