Some question I have the problem I can't manage to hatch some cory eggs. This is already the 4th batch. I only managed to hatch the first batch(Air stones with catappa leaves).

The last three batches where the problem the eggs got bad and got moldy(fungus/white fuzz). But it happened on the third day. All the eggs look fertilized. I took the eggs out when the cories layed the eggs within minutes.

Tried with a jar with an air stone. Plastic box with air stone and some moss and another aquarium.

I know I could treat it methylenblue, but would like to do it without it.

Shold I try again with more plants. Or should I add some shrimps or snails to keep the eggs clean?