Those azul's gonna get about 32" so let's see... Unless you planning on that tank to just b a grow out I'd suggest like stated above no less than 8x3x2
Those dimensions correspond to a full water volume of only 180 gallons. If I were to remove the glass thickness and the likelihood that it will not be filled to the top - 140gallons tops. Cichlas need a lot of swimming space coz they are fast swimmers. This means they are both a footprint and tank length fish. My 2 cents...