Hey guys, sorry to ask another question about a tank being a good deal or not, but I found a 125 gal setup on Craigslist. It comes with a wet/dry filter system, stand, lights etc. etc. The guy sellin it wants $400 for it, but I'm sure I could talk em down. You guys think this is a good deal? My 4 Red Belly Piranhas are out growing their current tank quick. Also, do you guys think I would be able to add 2 more to the 125 gallon tank and have them live there for life? Thanks in advance. 