The albino cory is usually a Corydoras aeneus and are considered by many to be the most prolific cory breeders. Get a heater as soon as you can... temperature fluctuation could be a reason they died. Dont get a new filter for the tank, if you use the specimen container, tank current will not affect the babies.
The basic Cory breeding setup..
Basic tools needed
-scraping device and a catching utensil. This is my setup... Metal pie slicer thingy.
-turkey baster to clean the container
-Over the tank specimen container. There are no openings in this container so daily cleanings are required. I have seen them for sale for $4 and $10.
1- Fill the specimen container with tank water and hang it over the inside of the tank. This way the specimen container will remain the same temperature as the tank.
2- remove eggs carefully and place them into the specimen container. The eggs will be sticky and will likely stick to your scrapper. Do one egg at a time where possible and try to scrape them to the wall of the inside of the specimen container, don't worry if the eggs fall to the bottom of the speciment container and bunch up. Viable eggs will turn a grey color in a day while unfertilized eggs will turn white. Remove these if you can, along with any eggs that have fungi growing on them.
3- Eggs will hatch 3 to 5 days after the parents spawned.
4- Start feeding around 2 days after the the babies hatch. Very fine flake food will work do this several times a day. If you see any babies without an egg sac, start feeding.
These babies still have their egg sac
This baby is around 3 days old and does not have the egg sac.
5- remove 50% of the water in the specimen container at least once a day. I remove the water from the specimen container with a turkey baster and pour it into the main tank. Make sure that you remove any food from the bottom. Once I remove 50%, I fill it back up from the main tank. It is best to do this an hour or two after feeding to make sure left over food doesn't pollute the water. The idea is to provide a small area for the babies so you can watch the babies progress and so they can find food without polluting the tank. They are very poor at finding food for the first few months.
6- After a few months, they should be large enough to join the main tank. I have a grow out tank just for babies and I wait 3 months before I add the babies.
1 Day Old
1 Month Old
3 Month Old