i hadn't done enough research last fall to know how to overwinter them
so i just put them in a large aquarium. they all survived. i'm going to
wait until the water stays at a consistent temperature, around 15
before i drop them in.

they are feeders. last year when i got my first batch of feeders they
all died because the water was too cold. the same thing happened with
the second batch. the third batch went in mid may and they all survived
until now.