What are the tank dimensions (length x width x height)?
What is the GH (general hardness), KH (carbonate hardness) and pH of your water supply?
This information can usually be obtained from your water supply company's website or by telephoning them. If they can't help you, take a glass full of tap water to the local pet shop and get them to test it for you. Write the results down (in numbers) when they do the tests. And ask them what the results are in (eg: ppm, dGH, or something else).
Hi there the water was tested I cant remember exactly however they said it was ok for then both but I have 100l tank and I will upgrade later I have a peacock cichlid and a mauna cichlid who grew up together but they will be moved later in a few months
I have removed the redtail shark I I ky just thought the cichlids and have a larger tank at another property for the redtail shark the cichlids ar 1 and a half inch max and they are my favourite fus so I'll keep the alone and do it that way
Mbuna and peacock really aren't compatible either. Some people do it, but it's heavily not recommend. Mbuna are more aggressive and also have different diets. Mbuna need more veggies. Too much protein will bloat and kill them. Peacocks need more meaty diets.
Also, since Africans are so aggressive, it is common practice to stock heavily so fish can not be singled out. With only 2 fish, it's likely one will kill the other.
If you post a pic at least we can tell you what species you have.
I can't say that adding more fish to a tank that is already too small is a good idea... the best line of action would be to have a proper tank size and stock accordingly.
It's hard to tell from the pictures, but it looks like the mbuna is an albino auratus and I cannot tell what the peacock is. Peacocks will color up as they get bigger and it will be easier to ID. Maybe someone else can figure it out.
Aside from aggression, as previously mentioned you still have 2 fish that need different diets. There is no way to make sure one fish eats the right food.