So, I started out with the 12gal Fluval edge and it took me about 4 months before I decided it was too tight to get my arm in there for cleaning. Went up to Blue Fish in Grandview,MI and grabbed a 20gal and transferred everything over... not too much of a mess as it had only been running for 4 months so the sand bed wasn't a disaster when I tried to move it. Got some nice corals from WWC, Cherry Corals and Aquascapers and so far everything is doing well... will get pics uploaded soon.