I’ve got a breeding pair in my 50 gallon tank with tiger barbs and rummy nose tetras they have had around 40-50 at a time all but a few seem to make it I sell them for 1£ each at lfs. They will look after them very well (you do nothing) they are now my favourite Fish just the way they ‘walk’ them around the tank. It fascinating how they herd 40 odd fish onto a single leave and get them to wait!
Now from my research you just got to see what happens as the internet as conflicting info on breeding. Some say you got to take the male away some say after a while they will eat their to mate again others say male looks after them as well
My experience is male/female dig many caves under rocks 4/5 then they pick one few days later babies go for a walk male/female protect aggressively but not biting. Will chase fish away that weren’t even looking. Tiger barbs stay well clear and remember enough to move around the tank away from them. Rummynose dart away but always come back and will go for the babies but with little success. BN stays still so kribs leave him if he moves they do fight.
They will breed every 4-6 weeks I’m on my 3rd load now but can’t sell until 12weeks (something to bare In mind) I’ve got a sump so after they started digging caves again I removed batch the ones I left in there get chased a lot as the whole bottom of the tank belongs to them
So think you are going to have trouble with the shark and maybe the other kribs as mine think 50 gallon is theirs. Sorry if I’ve gone on got a newborn laying on me scared to move