Shrimp escape
Hi all, first time posting on Reddit but really just super stumped.
I set up an outdoor pond (small) in Genoa, Italy around spring time. Inhabitants include Medaka, Corydoras, 1 pleco, rainbow Minows for mosquito control and about 10 adult Amarno shrimp and 15 small sized. They have all been thriving for months now.
I could always find the shrimp in the evening cleaning and foraging.
Last week. I couldn’t see any all of a sudden. I have a makeshift cover over the pond for the summer for now.
I was worries about the quality of the water because I saw some plant decay at the bottom
So I decided to do a water change. I then noticed 3 large boys trying to escape the pond.
Today… I searched and searched and I believe there are no more left in the pond….
Any suggestions of what might have happened??
Photos of set up to follow