HI I have a 36 gallon tank with 10 cherry barbs and 10 glowlight tetras. The cherries are 2 regular males , 4 regular females and 4 albino females. One of the males is very territorial and keeps all the other fish in one end of the tank while he has the rest . Is this normal and what can I do about it? . He isn't harming anyone that I can see but the stress is what I don't like. Also I have a tank that is crowded on one end and bare in the rest..lol. I added more plants to break things up a bit ...but it didn't work. Any advise would be appreciated ...Thanks.