I'm thinking of getting this for one of my spare 7.5 gallon tanks : pair of german blue rams and a pair of peppermint plecos. I know there will be a tad bit of aggression, mainly on the plecs but that can be avoided with lots and lots of decor (lava rock, flower pots etc.) I also read lots about the fish I'm going to be breeding, and i read that the peppers are only aggressive to other plecos and german rams are pretty peaceful even when breeding.