Just a heads up, if your tank is less than 200 gallons, with normal pumpage (1000gph or less) and you get an argentea, you should expect that once it reaches its stride, at about 6-8" it will kill all other cichlids in your tank (especially the large ones), and after they are gone, any other fish of size.
I have kept around 15 argentea over the last 2 decades, they are one of my favorite species. At full potential one of the most beautiful, and have all been lethal.
Kept alone, great, in a community in any normal sized aquaria,150 or less, and without a very strong current to distract, very dangerous.