Hello my pond is about 5 years old, it's about 8'x5' and 4' at the deepest going shallower to a waterfall. I have no fish and in past years there have been lots of frog spawn, however this year the spawn does not look healthy I have fished some out and the eggs seem to be dead with white spots, and the tadpoles look dead . The question is would you clear it out or wait and see what happens? Thank you