I live in North Central Pennsylvania (Zone 5). My pond is about 1000
gallons and ranges from 1' to 4' deep. It was built last summer. It
contains many plants, 19 goldfish type fish, tadpoles, two small
turtles, newts and NO snails. Whay suggestions do any of you have
regarding the best snails for cleaning that would be winter hardy in
my zone? Thanks.