real quick, to answer a few Qs.
That cat is a P. granulosas. Similar to P. niger, but not the same. But VERY similar. Great huge, non-predatory hoover vacuum. Great personality. Right now he's about 14-16" I would guess. Should hit 3ft.
My ace is about 9", has a bad eye, and has to be handfed Silversides (smelt).. about 4-5" long. He gets one every other day.. he waits and begs, I dangle it in the water and BAM he nails it. Its funny... had him for almost 2 years now. Great "pet".
AS for the old tank... the 180 will be going to my nephew. He is a big SW guy, a young 20-something broke kid, and he is so excited to get my used 180 gal for free...
Thanks for all the comments guys... when I get that 700 gal up and running, I will post pics.