[Chasmodes]

I have no idea and have never done this, but my first thought was water quality with the new 10g tank. Was it cycled? My guess is that your sponge filter came from an established tank to help with that. Other than that, maybe you were correct that the food supply was too large. I think that once that 10g tank gets more established, especially if you stock live rotifers, etc., then perhaps you'll have a sustaining population of them and your success will go up. But, like I said, I'm not qualified in any way. However, I'll be following your progress and learning from your experience here as I'd like to eventually breed and raise juvenile striped blennies. Good luck with your next brood!