Hi,
basically, marine & aro tank is very similar in terms of glass thickness, silicon , etc.
The diff is the water pressure & the weight the tank had to handle, which might require proper/better reinforcement during the construction of the tank.
Next, it the design of the overflow. Almost all or most aro tank comes with underflow. For marine, pple will do away with it due to the DSB they using or afraid tank inhabitants might stuck inbetween.
For aro tank, pple prefer to go for triangle IOS becos there will be no sharp edges. For marine, pple go for rectangle/ square to have more piping within. More sides for the water to overflow in.
Therefore, some alteration to the overflow & bracing is required.
This is just for the tank design. Of course, filteration will be diff.
Cheers!
Goh