They're little litter bugs! No signs of a gabage pile, they just throw it everywhere.
This is where all the shrimp goes.
The arrows mark egg piles.
The pupae are stored at the front (and on top) of the pile and the larvae are closer to the wet cotton.
They built themselves a little DIY feeder "improvement".
Here you can see the size difference in the workers. They have some bigger ones now (the worker in the middle is bigger than the two others).
They also vary in color. The younger ones are more yellowish while the older ones tend either towards a vibrant blood red or a more brownish dark red.
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