Andy Sager
Aquarium Advice Addict
For starters, yes it's possible that the 2 species may have spawned together but that doesn't mean that the eggs would be fertilized successfully or that the hybrid fry would survive or be fertile. As I said in a previous post, when spawning occurs, a hormone is released which causes other females to want to spawn as well. It sounds like this is the case here.
At this point, all you can do is continue trying to feed them with the egg yolk and try to get an infusoria culture going. Also keep rotating in more live plants that should have infusoria on them. There are other foods now available on the market by Northfin and Aquatic Foods inc but I have no experience with them. I did use one of the older ones ( Hikari First bites) on some Angelfish fry and Betta fry with very poor success so I went back to my live foods.
Another option is to use live rotifers used to feed newly swimming marine fry. These are micro foods for when the fry are in the planktonic phase. I'm not sure of the cost for these cultures so it may not be financially prudent using this.
At this point, all you can do is continue trying to feed them with the egg yolk and try to get an infusoria culture going. Also keep rotating in more live plants that should have infusoria on them. There are other foods now available on the market by Northfin and Aquatic Foods inc but I have no experience with them. I did use one of the older ones ( Hikari First bites) on some Angelfish fry and Betta fry with very poor success so I went back to my live foods.
Another option is to use live rotifers used to feed newly swimming marine fry. These are micro foods for when the fry are in the planktonic phase. I'm not sure of the cost for these cultures so it may not be financially prudent using this.