I have a male betta who was recently bred and had a massive bubble nest built with eggs in it. after initially placing the eggs in the nest he has almost completely ignored it, and now the nest is almost completly gone and I havent seen any of the fry. I fear that they have either been eaten or the eggs succumbed to some sort of fungus. It is a heated ten gallon tank that has been filed halfway and has no substrate on the bottom to make it easier on the male. if someone could help me figure out why he is acting this way. I really wanted to breed him, he is such a beautiful fish, but if he is going to neglect the nest I dont want to keep trying only to fail again. Thanks!