Can anyone confirm that this is a male bitaeniata? This is my 20 gallon long black water Rio Nanay aquarium. I have 11 neon tetras and the one apisto. Would this tank be considered fully stocked? if not, please post any stocking suggestions. I am running a fluval 307 canister filter so filtration is not a problem. Also, my apisto is flaring at my neon's, is this just hierarchy behavior? Is it OK since I have a larger group of neon's?