Small dead creatures floating?

[AVVITT]

For the last few days on and off I've had small semi transparent bugs which look dead, floating in my tank. The best way I can describe them is tiny, see through woodlice which are around a millimetre or less in size. Best I could do is take a video because my camera wouldn't focus on them for me to get a clear picture.
Parameters all ok so can't understand what they are and why they're dead.
Any ideas?

 

[WVNed]

The tiny animals are some kind of arthropods. They grow by shedding their exoskeleton. You are seeing the molts.

 

[AVVITT]

The tiny animals are some kind of arthropods. They grow by shedding their exoskeleton. You are seeing the molts.

Oh wow, really? That is a much cooler answer than I was expecting! I was thinking I'd done something wrong and killed some things lol. I feel much better now thanks