It may be necessary to grind the food in your fingers, or to allow it to soak, for the fry to be able to swallow the food. Don't skimp on the food, feed as many times a day as possible. Don't skimp on the filtration either - for starters you will need an undergravel or sponge filter to remove ammonia. Carefully perform as many partial water changes as you can. When the youngster get to be about an inch, you will want to install a canister or outside power filter to handle the increasing waste load.
Water quality is very important for the adults, also.
Scientifically researched water additives are now available for the Lake Malawi cichlids. You want hard, alkaline, salty water to keep malawi fish happy. Be sure to also use a conditioner to remove chlorine and chloramine. You will want a powerful canister or outside power filter to remove particulate waste. The mbuna are great for moving the gravel about.