You shouldn't have any trouble with that type of set up. My suggestion would be to use Cardinal Tetras with the Rams as they both enjoy a lower ph and water temps in the 80's. I would also source your Rams carfully some of the farm raised strains are juiced up and don't last very long. If you could find a breeder or one of the better sources like Jeff Rapps or The Shark Aquarium both right here in Jersey and look for imported wild fish or some F1/2's if available. I love Rams but you have to be careful where you get them from.