Hi Steve, thanks for the response. To be honest, I’ve never algae before the weeds showed up. And even then it was very little. Being new to this, when I called about the weed clean up and they told me about the seasonal maintenance, which I was told is required to maintain the health of the pond by preventing algae. My biggest concern was/is the submerged weeds, which have taken over the pond and how it is affecting the health, fish, etc.