this morning i checked on the tank. each fish was on their respective side. no one had penetrated the great wall. then i took a shower. after i was finished, i checked the tank again. i saw that the algae fish went into 'the bloods' territory. ah! so i switched them. i put the gang into the algae fish's side and let the algae fish remain where he is. i'm hoping there's enough algae to keep him occupied that he won't be tempted to squeeze onto the other side again. i can tell that's it's definitely not going to work to keep the gang in such a small space. the meanest one is chasing the other two--quite a little terrorizer. as soon as i get home today, i'm going to have to be very careful and cut the divider to a perfect fit so i don't have to worry about illegal border crossings.