my advice for the rams would be to feed with plenty of frozen bloodworms etc and the occasional live feed. they prefer 6.5ph but mine breed all the time in 7.5 and usually just after a big 30% water change. they never make it into fry though as all my other fish eat the eggs so I would recommend keeping it a species only, maybe add some shrimp if you have enough plants for them to hide from the rams, what rams are you going for?