My tank is a 150 tall meaning it is 48' wide, but I want to upgrade my crappy skimmer to a msx 200 and while doing so I plan on going all out and adding a bigger sump that must fit under my stand I was thinking a 55gal but those are 48" and it wouldn't fit very well. I have a 30 gal on it now which works ok, but I want more space (skimmer won't fit anyway). Ive been looking at craigslist and haven't seen a lot except 55's most of them are full systems or crap that they talked themselves into calling it complete. Is there a cheap way to go about this and make it fit. The inner length is 47" plus I want to just take out the center board between the doors and slide a bigger one in there so I will need a little bit of wiggle room. Maybe a breeder style tank would work? or...? Rubermade ideas.. Thanks in advance.