I have a 125 gallon cichlid that has a 40 sump attached for filtration. I have a mixtuire ranging from mbuna, peacocks, haps, and one Frontosa, also two Pletcos. I would really like to go with all Fronts. I hear that they are very hard to keep. So far I've planned on painting the background black and going with black sand with plants. Been researching Black Diamond Crushed Coal. Any help would be greatly appreciated.