I haven't had much luck with my cories. But then again, I haven't actually been putting any effort into either. They are in a community tank and between the parents and the others, the eggs don't last long.

Suz hit it perfectly with the current. Keep it moving over the eggs. I don't do the meth blue as I don't want to dose the whole tank. The QT tank would be a great option.

What I have done is build a DIY egg tumbler. Most cichlid breeders are familiar with them. I'll be using this on the next spawn.