Thanks for the answers!
The fry are ~1 cm tail included.

I guess the rest of them could be hiding since we have a big root and lots of plants. I could also imagine our botia eating them all just out of curiosity. (The angel is probably too old to do anything to them)
Many of the fry seem to be ...

We discovered ~15 ancistrus fry yesterday when cleaning the pump.
One of them went down the bath tub drain but we managed to save it :)

Where's the best place to keep them?
In the main tank with mum, dad, a botia, an angelfish and a few tetras, or in their own tank (assuming that we can actually ...