well its a 140 gallon 5'x2.5'x1.5 tank mate are 8 salousi, 6 p. flavus, 6 petro "chimbta", 6 rusties, and 6 c. afra minos reef. i also checked to see if the water was ok and didnt get any high readings so i assume it would be sickness.
No ammonia or nitrite and not overly excessive nitrates im not how many males there are i know there are at least 2 salousi males but all the fish are still juvies between 1 to 2 inches. They arent being too aggresive however you never know with mbuna. and fins arent tattered and a few were hiding hope this helps thanks very much.
With no more than we have to go on, it's impossible to determine what is going on.
If you truly do have 2 saulosi males and they are starting to sexually mature, aggression could be an issue. (2 males rarely work out with any mbuna- better to have one or even 3 with a higher female ratio)
If some of the fish are hiding, that can also indicate illness or aggression problems, so again, no real answers...
How is the saulosi now?
Without a hospital tank, there isn't much you can do other than watch for symptoms or signs of trouble. Make sure all the fish are coming out to eat, and keep a very close eye on the tank for a few days.
ok so i have noticed a few torn fins one on the flavus im sure due to aggression because *** seen it and a think the salousi is a smaller male beaten down by the bigger dom male and hiding is most likely aggression because its the flavus who are hiding and they are the most con aggressive in the tank other than that all really come up to see me and continue to beg for food(even though i dont give it to them)only two small feedings a day and all eat without spitting(except the beaten salousi whos in hiding)