Ok... i have had a silver aro for almost a year now... got him at 5 inch or so and is now around 22 to 24 inch... i have a 600 gallon that will be running for him in a month or less... the question i have is that i also am getting 2 black aros 10 to 11 inch tomorrow... at what size would you guys suggest putting them together in the 600? i was thinking of letting the blacks get to around 18 inch or so which would mean the silver will probably be 25 to 27 inch might be bigger.. have heard that at 24 they slow way down.. so i'm hoping by the time they are 18 he won't be over 27... he has slow way down on his growth... he doesn't mess with any other tank mates in the tank at the moment... the 600 is 8 ft by 4 ft by 2.5... any info is welcome as this will be my first time trying a aro community... thanks