MisssMarie
Fish Addict
How many should I put in a 10 gallon, and what should be the ratio of males to females or should it be all males or all females?
what kind of killies do you want
You want colour......You are then faced with a few problems....Killifish males hold all the colour with females being somewhat drab.
Males for the most part do not get along with each other.....and one may be harassed and bullied to the point of death.
For a start you would need more females than males.....or you could go with all males but be prepared for nipped fins.
Personally I would just go for a trio....1 male : 2 females - Fundulopanchax gardneri sp.
Regards
C