I'm in the process of building a 6000 liter fish tank. The footprint is 12 x 5 x 4 or there abouts my question is can I keep a arapaima to max size in this tank
Your tank has a nice foot print so yes in theory you can keep a fish as big as arapaima. But in reality you are asking to keep the largest freshwater fish in this tank. This fish can get 5 feet easy with correct parameters. So 12 feet is not much for a full length swim.I'm in the process of building a 6000 liter fish tank. The footprint is 12 x 5 x 4 or there abouts my question is can I keep a arapaima to max size in this tank