The fish you have are Fundulopanchax Gardneri nigerianum "Rayfield". There are many strains of Gardneri of which Rayfield is one(usually linked to the location in which it was found). My personal favourite is Fp. gar. Misaje.
They are mainly plant hangers,
The set up I would use, but not on a long term basis, if it's eggs your after is as follows.
18x8x8inch bare tank (no substrate) with tight fitting cover glass, 4 dense floating mops and a couple of sinking mops (100% man made fibre) boil the mops first. It's best for egg production and viability to adhere to the soft water parameters they live in, in the wild, but they will spawn (maybe not as prolific) in ordinary aged aquarium water with pH 6.5 -7.0 & temp of around 72-74 degrees F.
Use a good trio (1 male - 2 females) feed them live or frozen food to bring them into condition.
You will not need filtration or airstones as this is not a permanent setup, the only thing is water quality can change dramatically within the confines of such a small tank. so any uneaten food must be removed immediatly. Keep them in this setup for about two weeks (by which time you should have an ample amount of eggs) Do three water changes in this time replacing about 20% each time.
Pick the eggs off the mops daily with your fingers, but don't press too hard, they are quite hard to touch. (I normally did this chore in the mornings before I went to work) Don't be disheartened if you only get a few one day. some days you'll get more than others. Float a small recepticle in the tank (small margarine tub, make sure its very clean) and deposit the eggs into this with about 1-2 inches of aquarium water from the parent tank. Inspect the eggs daily, if any become fungussed, remove them using an eye dropper. The eggs will start to ripen (darken) as the embryos go through their various stages of development. They should hatch after around 20 days.(some take less some, take a little longer) wait until you see them free swimming in the egg tub, they need to fill their swim bladder with air in-order for them to become viable fish, then float another tub and place the fry in about 3 inches of the same water.Their first food idealy should be newly hatched Brineshrimp/Microworm then as they grow Brineshrimp/Grindalworm then from there on try to ween them to some flake & frozen foodstuffs. Do not over feed in the fry tub, remove any uneaten food & do water changes daily. Move the adults and use the tank to rear the fry, They will need bigger quarters as they grow.
Hope this is of some help to you and if you have any more questions regarding Killis then just ask...
Fp. Gardneri Nigerianum "Rayfield"
