I'm in research mode as I am moving from a 10 gallon tank to a 75 gallon tank. So, I will be reading as much as possible on this site for awhile, until I can halfway catch up with the experts. Anyway, I am attempting a somewhat controversial set up with a male betta, corys, and a group of platy. I'm thinking in a 75 gl tank with enough plants, they should be cool with each other. I already have the male betta and 4 cory in the 10 gl, but I have to change the water every other day.