Hi 'Stratoquarius'
The pair of 'oligacanthus' shown are about 4 years old. They are full grown, the male being about 10" TL and the female 7". They are glutonous feeders but very slow growing like most Madagascan cichlids. They seem to do best when mixed with other Madagascar cichlids such as 'grandidieri' and polleni (or bleekeri). I also have them in with Paretroplus maculatus but Paretroplus in my experience are not able to compete with the Ptychochromis or Paratilapia sp. when it comes to feeding. Paretroplus love grazing, shaking their heads near the gravel to stir up food particles. I'm thinking of moving them out and into either a species tank or mixed with other Paretroplus species. I have P. 'kieneri', 'petiti' and 'menarambo' as well. Good luck with your 'oligacanthus'. By the way, yours should be of breeding size by now. I was surprised a couple of months ago when a 3" male and a 2" female put down a spawn.
If I can be of any more help, please don't hesitate to contact me.
-Jim