If you use boiled egg yolk you need to be extremely careful. It pollutes the water very very fast. Baby brine will take a day or two to hatch, and is really a hassle to get a large amount to feed unless your already set up to do it and have a good source of 90%+ hatch rate eggs. In the end though it all comes down to if you have a tank to rear the fry separately. Some may survive in the other tank but its not likely. Kribs can also be difficult to get rid of when they reach a sellable size. LFS get them cheap usually under a dollar their cost, so thats what you would be getting for them, and they don't want to have a lot of kribs in stock, a lot of the time they have difficulty selling them.