Now I have a pair of pearl gouramis, a pair of opaline gouramis, pair of gold gouramis, and a male blue gourami. There are a lot of hiding spots in the tank including plants, but the male blue gourami roams around the whole tank chases all of the other gouramis when they get close. I probably will have to relocate him or return all of the males back to the store except the pearl gourami as I heard they are more territorial and aggressive towards their own kind when they get older. What do you think?