So i have a full grown red devil and yesterday i tried introducing a full grown oscar. The oscar is bigger then the red devil but the red devil keeps bulling the oscar.. so my qustion is if i have a 110 gallon tank will the fish live fine if i order a dark peice of glass or get some kind of divider in the middle. But then they will only have 55 gallons each. My tank is 60×24×18 1/2.