Planted Tank Enthusiast
Join Date: Apr 2011
Location: Pasadena, california
You could do 8 rainbows in a mixed group, 3males, 5females. 6 may be risky since 1 male will have to be both betta and gamma. Just be sure to get them young and keep them well fed. Rainbows that eat plants tend to be ones that took to it after not being fed, imo. after rainbow intro, your gourami will probably stick to the thick weeds since he probably can't keep up in the fast lane on the autobahn. You will notice the rainbows get in on the cucumber or whatever else you leave for the plecs and cories.
One of my favorite communities was turquoise rainbows, panda cories, rasboras, couple of otos and 1 honey gourami. Seemed to all get along and compliment each other in behavior and tank position/feeding habits.