Leech trappers (for fish bait), use coffee cans with several holes punched/drilled
in the sides. Leave plastic top on, attach a wire for retrieval, put in chicken
liver and set in pond.
Check it twice a day, should catch any leeches present.
Sully

K30a wrote:

There are a lot of different species of leeches out there...... the ones I
have are about an inch long and fairly chubby.

If I decided that I really need to get rid of them,

I'm not really sure. If they are carnivorous one plan would be to take a piece
of liver, put it in a two strawberry baskets as a trap.
But if they are not... hand removal?
Maybe float a piece of lettuce?
Stop feeding your fish and let them eat them.
Tadpoles will usually hover up the sides of things, maybe they will eat them.

I would take a few out of the pond. Put them in a white dish with pond water
and study them with a magnifying glass and flashlight and see what you can see.

Around here a white dish is never to be washed off! My daughter and I just
brought in some insect larave and hatched some gnats out. We have a glass bowl
cover for hatching insects.

k30a