So I had a 75 gallon mix reef tank with an external overflow box. I was never really comfortable with that overflow box but it never gave me any problems the 2 1/2 years that I had it running. It was just noisy. I started looking for a drilled reef ready tank and it had to be 100g plus. But at the time I did not find any that met the criteria. So I came across this 80g Reef ready peninsula tank. I really really wanted a 120g or bigger but just could not wait or justify paying full price to the wife.:sad: So I picked up the peninsula tank.