if the rams are alone you can put a pair in a 10 gallon..however, rams may feel more comfortable with some dithers.
also the larger the footprint and the more room you have ..the better off the rams will be.
personally, I like to set up biotope type tanks..the 10 is just too small and looks cramped with driftwood and plants.
opt for a 15 or 20 gallon.