i got tadpoles too, these are not tadpoles. they look like little leaches in the green algae. about 1/8inch long and black. they were moving, and when pushed in open water resembled the way a tadpole swims....

MY POND: 50'X100' (1/8 ACRE) dug in 2006. get's deep quick with a trench dug in the middle that reaches 17' deep. i have aeration. i stock bluegill, bass, trout, and perch and couple crappie.