Hi, I'm new to keeping Tropheus Duboisi Maswa, but after 7mths of research finally took the plunge. I could only get a group of 5, they are a bit tricky to get here in Perth. They have been doing great for 2mths, on a vege flake & crushed pea diet,but every other day the smallest one gets bailed up in the corner. He seems to bounce back, but should I add more to counteract the aggression on this little one or is it too late??? They are about 3.5cm/1.5 inches long. The problem is I only have a 3ft tank 146ltres.