Eggs have fungus? Oh dear, that can spread quickly.
I'd set them up with a ton of plants if you can afford it. With cherry shrimp!! Cherrrry shrimp! They eat fungused/dead eggs but not healthy ones, they are little heros for breeders! A separate tank, but a mesh would be best and they are usually reasonably priced. Live plants will produce micro organisms for the fry to eat, you still have time until the eggs hatch to add live plants to grow some food in tank for them.
Otherwise, a separate tank with a bit of methelyne blue is used for cories. Not sure about plants, but it stains silicone so you'd be best off with a plastic tub/heater. A lot more maintenance too.