My wfe and I just purchased a 5 bed, 2.75 bath wo story home. One of the rooms and ajoining bathrooms are going to be my "fish room". The plan is to build a 300+ in wall system. Currently, though, I am only running a 70. I was wondering if I can go ahead and construct a ATS large enough to handle the 300g system and run it on the 70 until the build is complete?? I figure the only limiting factor would be the available nutrients needed for the algae to grow.