I didn't see many info about this particular species, so I decided to post this as my wild 404's have spawned a month ago.
I bought a group of 10 wc about 6 months ago from well known shop in UK. Different sizes, including 4 fully grown adults.


This is their home(top one). A 115(L)x45(D)x30(H) cm tank. Bottom one is for a group of 13 wc L134's .


Filtration Eheim 2217, Atman powerhead and a air driven sponge filter.
Nothing was happening till November. I noticed male trapping female in a cave in the middle of the current . After a week female left the cave leaving male in it. I didn't have any hopes for fry as this was the first attempt. It was a great surprise when I discovered after a week that the male is still in the cave guarding...wrigglers

After another week I took the cave out and left it in external breeding box.
4 days later took the cave out to see this



I managed to count 41 of these little stunners.
Added piece of wood and airstone and let them be till ready for first meal.
Now nearly a month later, 39 little bandits are constantly flying not swimming . Eating well on crushed Prima and spirulina. Once a week frozen Cyclops. They are not interested in cucumber nor in lettuce. Not even in courgette... Lost 2 of them for no reason. All other seem to be happy


And a short video ;)
https://www.youtube.com/watch?v=4tYKGbLQd1c
Please, share your thoughts and ideas about this rare and very beautifull Hypancistrus
All the best
Rafal