Do you have a specific water parameter question?
You'll want Ammonia and Nitrite at 0ppm, which will happen naturally as the beneficial bacteria establishes itselff.
You'll want to keep the Nitrate below 20ppm, which is accomplished with PWC
Ideally, you'll want soft water with a lower PH (6 - 7) for South American Cichlids. However, don't mess with your PH, unless you have a situation where it's coming out of the tap above 8. They will be fine anywhere in the 6 - 8 Ph range and its more risky trying to treat it.