Since I've only had them 5 months I'm no bartoni expert.
As stated above, I also find Juan Miguels info from the Cichlid Room Companion site extremely valuable, and Lee Nutalls Central American scene fabulous.
I always try to do research on, and provide as many of the natural habitat parameters for my cichlids as possible, temp, water flow, tankmates (if any).
They seem to be very similar to beani, so I treat them much the same, and have not had bloating issues with either.
Temps in the low to mid 70sF, moderate flow, daily water changes, so nitrates are in the 2-5ppm range.
Water comes out of my tap at a pH of 7.6-7.8 with an alkalinity of about 90-100ppm.
And I don't encourage a speeded up growth rate, feeding only once per day with a fast day every 2 or 3, although I do encourage algae for constant grazing. The green tank wall in the pics is due to algae.
I use also planted sumps, and terrestrial/marginal plants in any tanks that get sun, the bartoni tank has a large potted papyrus as part of the decor and they spend much of their time amidst and around its stems.