"jw 111" wrote in message
...
hi, we have a water tank in the garden in london, england 2' (feet) by
4' x 2' high that overflows into a smaller water tank 1.5' x 2' by 1'5
high. in the larger tank are two goldfish and in the smaller tank just
some water plants.

we have recently found some extremely tiny fish in the small tank. they
are very similar to ones in a stream that runs about 100 yards from our
house.

since we did not put them in; the question is how could they have have
possibly got in there?
If they are not GF fry and are definitely the type from the stream, they
probably came in as eggs attched to birds legs.

Peter