This species prefers soft, neutral to slightly acid water, but will do well under conditions of moderate hardness (up to 10.0 degrees hardness) and alkalinity (pH 7.4). Both Papiliochromis species are very sensitive to dissolved nitrogenous wastes. Light stocking of their quarters and efficient biological filtration in conjunction with frequent partial water changes will maintain water quality at an acceptable level. The Bolivian ram seems to prefer cooler water than its Venezuelan relative. Temperatures of 74 to 78 degrees Fahrenheit are sufficient for ordinary maintenance, with an increase to 85 degrees Fahrenheit for breeding. This fish is not a fussy eater.
Quoted from a very reliable published student of aquatics and ornamental fish Peter Hiscock. There is a wealth of information and garbage online so I take my time and sift through it until I find something I can learn from.