Reef Tank Shape

[engine49]

Hello all. I'm trying to decide what shape of aquarium to go with for a new reef tank. I'd like about a 90-125 gallon tank. In your experience what works better, a shorter wider tank or a longer narrower one? The largest tank I've had until now is a 55 gallon. I'm leaner toward a shorter 120 gallon reaf ready tank. Would this be a good size to position the lr in a pleasing manner? The only downside to getting the shorter tank is that I dont think I'll be able to fit a 55 gallon i want to use as the sump underneath.

Thanks again

[lando]

Welcome to AquariumAdvice.com!!!
two important factors are water surface area and depth of the tank. The more surface area, the better gas exchange. This will add in keeping Ph a bit higher. The depth of the tank is important in terms of lighting. Obviously a deeper tank is going to need a more intense lighting system for better penetraton. Longer, shorter tanks are better from a lighting aspect and also better if you plan to keep fish that need horizontal swimming room, such as tangs.