I have a 2 breeding pairs and a breeding f1 trio in waters of 7.6 ph , gh of 175ppm and a tds of 200ppm and keeping and breeding them isn't an issue in face all of mine breed in the same waters including wild pelvicachromis species, wild apistogrammas and even discus so yes you can keep them and even breed them in your waters without problems so go for it but if you do look more to wild. Caught rams which rare aquatics sell and post them as there a lot hardier than the tank breda as tbh there getting very weak these days from the amount they have been farm bred