Wow, I had no idea petricolas were a schooling fish: thanks for the info
I've missed that in my research :O
Would a school of 3 be ok to start with (I'm going on cory and loach lore with that number: I will admit I've never kept synos before), with the possibility of adding a 4th later on if I find they're not particularly happy? I'm just trying to think within my space limitations.
The tank itself is actually only 33" long (custom deep). Not ideal for cichlids which need a large 'footprint' I know, but I understand from the 'cookie cutter' setups at a well-known cichlid info site, that peaceful small species can be kept in smaller tanks even, so I figured if I kept to those for my tank and treated it in effect as a 29G I'd be ok, hence the yellow labs and the c.afras.
I was advised on that site that a group of 6-8 yellow labs + 1 petricola would work (by the site admin) but I thought some variety might be nice. Am I better sticking to the original advice, and reducing to say 6 labs + 3 petricola instead?
Also, I am pretty much set on the petricola btw: I have spent hours and hours of research on synos and they are the only small peaceful syno I'd feel comfortable looking after. The alternative was the cuckoo (multipunctatus) but this practices brood parasitism which I'd like to avoid.