My parents have quite a large pond (probably a recreation size pond),
stocked with goldfish, frogs & a couple of turtles. This spring, after a
particuarily long & cold winter, some globs of nasty looking, almost
fluorescent green algae started floating to the top of the water. The frog
population seems OK, but there is a distinct lack of goldfish around. Could
the algae have something to do with this? What causes it? Any
comments/suggestions would be helpful.

TIA

Jacqui