Id wait another couple of weeks, just to ensure the tank is fully capable of handling the bio-load, as ideally you would want to add them as a group of 6 to start with, the larger the group the better, as they enjoy their species company. The ideal ratio is 1m-2f, however, I have 4m, 1f boese and 3m, 2f Lacustris (turquoise) with no problems at all, if you keep all males, you may find they dont display fully as they really colour up in the courtship process, males displaying to the other males to show off to the females.
They will need a minimum of a 50% weekly water change, they flourish with clean water and nitrAtes need to be kept quite low, they can be prone to mouth fungus when the water quality drops.