These are fry at about 12 days from the spawning. You have to be extra careful with eggs at this age as they are very fragile. Try to keep the tumbler and tank clear of detruis that could end up spoiling the eggs.
Keep in mind that the eggs only need to be waivering slightly in the tumbler, and not actually tumbling. Just enough to keep oxygen rich water circulating around the eggs.
Here’s another video taken a few days later.
There should be 4 purple rainbows and about 10 Duboisi in there.