It's my understanding (I never kept them) A. stalsbergi is more aggressive then Aequidens rivulatus the common Gold Saum, all of which I have kept have been fairly mild in temperament. As you know I have 4 Aequidens diadema sp. Jenaro Herrera due to arrive today. Both stalsbergi and sp. JH are beautiful fish, I personally feel the JH to be better looking perhaps somewhat smaller and perfect for a 90 gallon set up for grow outs and then hopefully for a pair. I can't say anything about which will sell better, selling fry is always a crap shoot and I never consider salability when deciding on a breeding project because very few people are interested in the fish I like to breed. I tried like hell to push Krobia Xinguensis and despite my thinking they are arguably one the most interesting and striking acaras South America has to offer there was still little interest. It seems there are not that many aficionados of SA's most like the aggression of the bigger CA's. I just give fry away to any MFK'er that wants to come get them or end up using them as feeders, which always saddens me.
Perhaps the stalsbergi, which really has little appeal to me might sell better based on them being more well known and one of the "hot newer fish" out there (remember the Umbi, Festae craze which thankfully seems to have died out a bit). Most casual to intermediate hobbyist may not even know what a jewel the JH really is. I’m excited to be able to get them and can’t wait to see them grow out. MY .02
