Hi Everyone,
I need your guys help here... About 3 weeks ago my zebra pair finally spawned for me. They produced 5 wigglers but 2 died after 1.5 weeks. Then the 3rd died a couple days later. So I still have two fry left from the batch. One week go by… the two wigglers left were doing fine, then today as I was vacuuming the left over food, I found another wiggler was dead. So I still have one wiggler left from the spawn.
I have an automated water changing system that I have setup. It does 20% water changes every time at 4 times per week. My temperature is keep at 85 degree F. I have a power filter, sponge filter, and power head in my tank. So I think the tank it is pretty clean and has plenty of oxygen.
I have been feeding them 2x per day since the wiggler were kicked out of the cave by the dad. At first I was feeding them Hikari Carnivore pellets and NLS grow but I didn't vacuum left over food from the feeding and I think a hairy fungus grow on the food. That is when I found two of my wigglers dead. So I changed their diet to TetraMin Pro Crisp and they have been on that since for about 1.5 weeks now. I tried to vacuum the leftover every morning or once a day. They seem to be doing fine.
Yesterday, I didn’t vacuum their leftover food and this morning I saw the hairy fungus developed on the very little leftover food. That is when I found one more wiggler dead. Could the wiggler be dying because of the fungus?
Of course, I checked up on them every morning before work for accountability.
I am just very puzzled by this as I never had any problems raising other catfish fry except for zebra plecos.
So what am I doing wrong for my wigglers to keep dying? Any advice would be appreciated.

