I have never experienced a male eating fry – in the cave. That would also be a little contradictionary. He is committed to taking care of the fry while in the nest, so he wont eat them. Even after they leave the cave he is likely to not bother them. But female are famous for doing it.
I have transferred cave with male and fry, after they hatched, but before leaving cave.
I normally get a lot more fry this way.
Regarding seing fry once they leave the cave, – its quite likely that you dont see them, even going for artemia etc. – but of course if you clear the tank – there wont be any left.
But they hide, and they take one or two artemia which happens to swim to the back of the tank, – the fry dont nessesarely go where the artemia are, – or they live of something else in the tank, smaller things, – who knows.
I am not saying this has to be the case with your fry, – I am only saying that this is what people normally experience with paro fry. You dont think you have any, but you do. You may not see them at all before they are rather big, and you wonder every time – how do they manage to excape you searching the tank like a detective with flash light and all sorts of things.
🙂