Just seen Peters response 🙂 .. of course you might think that it could be a problem feeding fry, – however, I would not be too pessimistic about this. If you provide an area with a good bit of javamos – say in one corner, and the cave close to this, – the fry will certainly be in this area and you could point your feeding to this area.
The problem of feeding fry I think is a problem even in smaller tanks, because you have to have very very small food available, and this is often difficult for new breeders. But if you find this and find out the tricks to handle it, – I think you would be able to feed fry also in a tank this size.
I currently have a 30 liter tank with a pair of P. nagyi, – and find no problems here, – fry is growing up fine, finding food good.
But I also do see Peters point, theres no saying if it might turn out being a problem, – but then i do think its probably linked to other problems too, such as getting aquainted with very small type food and so.