well I can tell you right off the bat that the bass and whichever species of wolf it is will outgrow a 70 in less than a year, so unless you plan on going like...250ish gallons I wouldn't even waste the money. Also there will most likely be serious aggression issues in a tank that small with those two species of fish.All is see is columbain wolf fish doesnt specific what species i havent got the wolf fish yet but they would be in a 20 gallon then would prolly transfer over to to maybe 70gallon or bigger