Hey people. As way of introduction: I live in Miami and I have an oddly shaped pond which I think is about 1500 gal. I have a mag pump 1800, a skimmer, and a 32 gal. filter. The pond is about a year old and is doing pretty well. Oh and also a 3 foot waterfall with its own pump which I don't turn on much. Animals: dragonflies, guppies, snails, a couple of snakes. Plants: water hyacinth, 2 lilies, many submersed plants, string algae (but not too bad). Well that's about it. My problem is the frogs. At first there were some tiny tiny frogs born. I had lots of tree frogs and even a couple of bufo toads. Lots of tadpoles. But now, maybe 6 or 7 months on, the tadpoles disappear in a week and the frogs are gone. Maybe 1 or two come around. I loved those guys. What do you think is happening? Anyone? Thanks, Lor