Cameron,

Welcome! After reading your post, one item of concern that first came to me was runoff from the vineyard. I think it might be a wise investment in your time to get an assessment of what types of chemicals, if any, your neighbor uses on his vineyard and/or estate. If you are on the receiving end of his irrigation runoff, now would be the time to give some thought to what may end up in your pond. Keep us posted.

Russ