The jar is about 4 litres and closed since the 28th of may.
I've taken some water and substrate from a rain fed pond in northern Germany.
There were a few mosquito Larvae in there that have hatched one night. Ive found them dead on the surface the next day.
Beyond that im seeing two species of snail. some hydra. Ostricods and copipods.
Small tubifex worms.
The big plant i got from an aquarium store because the pond had no suitably small and fully submerged plants.
Its not my first but the biggest yet. And by a lot.
by VincentOak