ive been looking at true parrots and a local guy is selling a 8" WC and another 8" one. ive read that they get 15" but most peoples i've seen on here and cichlid-forum are about 10-12". also how aggressive are they and how fast is their growth rate. could i keep one of the 8"ers in a 48x18 or a 48x24 for about a year or so with tankmates? thanks