You know what its all about trusting and having a reputable seller noone knows for sure unless they import that gibb themselves so its pretty much a trusting game and who are the reputable dealers in the trade so yea and also some can tell which variant it is but with the zaires IMO theres really no different between themselves like kitumba,moba,kapampa. Some say the kitumba has a violet to purple tint to them but under regular lights its hard...
Frontosa they say that its the northern area of lake Tang where burundi's and Kigoma's and the other types of morphes of these guys.
Gibberosa They are said to be the south of the lake like the really blue guys due to different morphs on how i see it but i say they all are the same to me just different colors.....which are really good looking Btw