Small 5g Tank

It's obvious this pair of koi Angels are not going to stop laying eggs, so my plan is to put the eggs in this small tank when they become wrigglers, with an air tube to fan them, I know about fungicide, then with Acriflavin, an antibacterial, I Have also thought about dividers, in the big tank but that would be difficult to do , any advice would be welcome...........

have you got a sponge filter Brian? I've found they are the best for fry as the fry feed off the microscopic bacteria on them. They run off an air pump so you'll need one of those too. If it were me I'd get it running now in your main tank to let it build up some bacteria and then once your ready to move your wrigglers move the filter in and then once they are free swimming they've got somewhere to feed from.
If angel fry are anything like my curviceps fry they are way too small to manage baby food. I fed my curviceps fry liquifry for at least 2 or 3 weeks before gradually weening them off it and on to tetraMin baby. They all congregated around the sponge filter though and could be seen feeding off it.
Also, get yourself a moss ball or two ... they also hold a lot of the microscopic stuff for the fry to feed off. I also covered a large flat stone with java moss.
The first thing to kill them is hunger so providing several feeding spots is a good idea in my experience

No experience with raising eggs/wrigglers away from the parents, but I believe the key is making sure that the raising tank is clean. You're going to need something much bigger to raise the babies in, once they're free swimming (although you could raise about a dozen in 5 gallon until they were 3 or 4 months old).
Angel fry are a bit larger than dwarf cichlids and will take newly hatch brine shrimp (bbs), which is what the majority of breeders use, I feed mine on the bbs for the first month, at which point I start feeding crumbled flakes, but I continue to feed bbs until they're at least 3 or 4 months old, I just gradually increase the proportion of flake, and decrease the bbs as they grow.

Thanks guys, once again the eggs have all gone, the only way this is going work is as rob say's, put the parents in a bigger tank, and let them do the job properly, that will stop any aggression from the pair chasing off the other fish and eating the eggs.........

aww I'm sorry to hear that Brian ... I hope they get the hang of it soon