Just want to give you a rundown of the fry situation.
I've observed the following. Although fry have been spotted elsewhere, these locations always have the same fry in them. The arrow pointing to LOCATION 5 indicates where this particular fry moved from (ie the location in the vid above).
1. Rusty Fry. Likes to hide in the pipe hidden there for my undergravel jet. Survived the entire tank bumrushing the pebbles when the Firefish stole the Catfish's pellet and dropped it in the gaps.
2. Rusty Fry. The pebbles go all the way to the back of the tank from theis front location, some are buried deep creating chasms underneath for retreat. He only comes out when feeding.
3. Afra Fry. The largest fry of the lot. Although a small space, the labs like to get busy back there so I don't know how he survives to be honest.
4. Rusty fry. Has chosen one of the main escape tunnells for fish, also big enough to get the catfish in. He goes from the middle hole to the lower hole (under the angled rock).
5. Afra fry. THE BIG MOVER. Started out in location 2...then went to the location of the vid (ie where the arrow is coming from), then went up to LOCATION 5. He goes from under the pebble on the left, to right out in the open on the right. You cant tell from the pic, but the large rock crating the peak of the mountain so to speak in concave underneath creating a large cave which is innaccessible to all fish (none have ever gone in). It's a good spot despite being the highest.