I will second asking spencer jack. i was looking at an aquabid auction a couple weeks ago, trying to get info on "gymnogeophagus blue neon valentine". i couldn't find any info from googling, except that spencer jack's website kept coming up repeatedly. well, i finally just asked the seller the basic questions: does it have any other names (because i can't find much info with the listed name), how big does it get, what type of water chemistry/temp does it need, what does it eat, are they peaceful, aggressive, or territorial, do they breed easily or do they need specific condition, etc.". well, the SELLER, even though i told him that i was having trouble finding anything out about the fish through internet searches, told me to go join a cichlid forum and ask them there. right, so. . . you can't even tell me what you are feeding the fish you are selling right now? wtf? so i asked spencer jack through is website and he very quickly responded and gave me a ton of great info. in fact, he's the guy who caught and imported the fish in the first place.
and it turns out, if you can get your hands on a few of this type of fish, they only reach a max of 5 inches.
and on a side note, the seller on aquabid was prontodelivery. good prices, but seriously, if he can't be bothered to answer a few simple questions for a potential buyer several days before the auction ends, it makes me very uncomfortable to think of dealing with him if actual problems arise. so now you know.