Summer live microscopy

What microscopic critters swim in the waters of Helsinki rivers and lakes in this hot summer weather? As usual, in this online live stream we will explore the invisible world around us through the lens of the microscope. The event will be a zoom call with a live feed of the microscope view. I have gathered water and moss samples from around Helsinki, and I will get some fresh ones the day before the event so that we may see some bonus water bear ;)
The event is informal and everybody is welcome to join. Feel free to ask questions and make comments at any point during the zoom call, either through voice or text chat.
If you have suggestions for some specific sample you would like to see, let me know at least a day before the event and I may be able to collect what's needed.