My experience with haitiensis was an experiment of sorts. I found some at an lfs and bought 3. They were approximately 2-2.5" at time of purchase. I put them in a 3 foot 30 gallon tank with an aquaclear 300/70/whatever it's called now (flow rate of 300 gallons per hour..lol) and a large powerhead. There were a couple of small clay pots, gravel but otherwise the tank was pretty bare. It was on the bottom of a 2 tier rack and there was very little light except for natural light in the daytime as the tank was in the garage.
I fed these guys once or twice a day with everything high protein I had...freeze dried krill, freeze dried bloodworms, kensfish cichlid pellets, earthworm food sticks, shrimp sticks etc. I didn't feed them anything spirulina or veggie based. I changed water approx. 30-50% weekly and the temp was most likely in the high 70's to low 80's.
All 3 fish thrived until the dominant male of the 3 doubled the others in size and killed them. In just a couple of months he was approx. 4-4.5" and in perfect health. Unfortunately, something happened <I don't remember exactly what....this was several years ago> and I had to move him into a much larger tank with other similar sized and larger cichlids...even though they were fairly non-aggressive in temperament...the hait died.
The biggest common denominator between all of the "bloat-prone" CA cichlids <istlanum, beani, haitiensis, several Thorichthys> is that they're mostly riverine species. They're all also fairly rare so the specimens we, the casual hobbyist, would be able to get ahold of would not be very far removed from the wild...they're most likely going to be F1 or F2...not like oscars, jack dempseys, firemouths etc that are so far removed from the wild.
This means, to me, that the most important factor when keeping these fish is keeping the water as oxygenated as possible...especially if you're going to raise the temp into the low to mid 80's...like cchhcc said, the higher the temp, the less oxygen will be in the water.
Oh yeah, I wanted to add that around that same time, I was a member of the Louisville Tropical Fish Fanciers club. Rusty Wessel is a member of this club as well so everytime I went down for a meeting I got to pick his brain about this or that <also got to see his fish house.....WOW

>. I asked him once specifically about haitiensis and his thoughts on the susceptibiliity to bloat and mentioned that many believe it to be diet related and that they need a lower protein diet. He was very surprised by this and said that, in the wild, they primarily feed on smaller fish so diet shouldn't have anything to do with it.
