I have a tank that currently holds 3 blue gouramis about 3inch long and holds 3 unkown fish of the same size that are light brown with black fins and dark brown stripes, i have another tank that holds 7 tigerbarbs they have outgrown that tank is it safe to move them into the bigger tank thank you? also think 2 cory cats will be ok as well i know gouramis can be territorial thank you for any advice.