You should not have been keeping Pseudepiplatys annulatus (Clown Killifish, Rocket Panchax) in with those tankmates, they are too placid and delicate, even the guppies would give them a hard time.
Here follows a personal account on how to keep and breed this small species.
Get hold of a tank 18"x8"x8" set it up with no substrate. Add a small air driven sponge filter and set it to a trickle. Place in the tank 4-5 synthetic floating spawning mops. Light the tank if possible and cover the surface with the floating plant Salvinia. (this will subdue the tank and make the likelyhood of jumping virtually non-existant)
Water is fairly soft and slightly acid pH 6.4. Temperature is around 75'F. The males can be quite quarrelsome so I would add 1 male to 3-4 females to this setup.
As for feeding, they will accept finely crushed flake but I prefer to give them live where possible. Adults love newly hatched Artemia nauplii, and Grindalworm.
They are predominatly surface dwellers and they will spawn mostly in the top of the mops and on the roots of the floating plants. The eggs hatch in 12-14 days. I prefer to breed these in this natural method setup because of two reasons. (1) the fry are very small upon hatching and need to have micro foods for a month or so and they seem to find them amongst the plant material (I also culture infusoria to be sure). (2) The eggs are very small and I do not like to handle them.
I perform 30% water changes on a weekly basis and Blackwater Extract is added.
Snails are an enemy to the killifish breeder as they will consume the eggs. So make sure you dont introduce any with the plants.
I would say that they are not very prolific (compared to larger species) and the road to sexual maturity is a long and slow process. (So you will have to be patient)
I hope this was of some help to you
Regards
BigC
