ilive466 - you should determine the reason the African's are dying before doing anything to make sure you have things under control. What are your water parameters Amonia, Nitrite, Nitrate, Ph, KH and GH, water temp, and how often do you do water changes, how much water do you change and do you use decholrinator? If you can answer these questions we can help you better. If you don't have the basic test kits for Amonia, Nitrite and Nitrate, might be a good idea to get them, should only cost you around $15-$20 for all three. Let us know the readings and your other water parameters.