I have a pair of apisto nijsseni in a 125 US gallon, but want to add more (there is plenty of bogwood/plant/cave cover), should i add another pair of nijsseni, more females (do they form harems), or should i add another apitso type, i have access to;
Aggassizi
Cacatoudies
Macmasteri?
Aggassizi
Cacatoudies
Macmasteri?