Not too long ago on this site I saw a textured-rock setup that mounts inside the tank, and is very realistic(and kind of pricey lol). I cant remember the name of the company for the life of me, but I remember the piece being around $200 or so for a 55G spec aquarium. My question is, with that kind of protrusion on the back wall of the entire aquarium, how, and are you guys running a Fluval FX5 setup, b/c they all seem to mount the intake/return lines via suction cups to the glass, and Id REALLY rather not have it mounted to the sides(trying to make it as sleek as possible). Also, is anyone running a heater inside of their fluval(specs/how do you mount), b/c Id love to get rid of the standard heater look as well. Thanks for any help guys! 
Is an FX% overkill for a 55G as well? I want to upgrade to a 125G+ someday, but dont have the cash atm lol.

Is an FX% overkill for a 55G as well? I want to upgrade to a 125G+ someday, but dont have the cash atm lol.