Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Moss / Algae - New Pond Ower

Welcome to the forum. Losing the water might have helped by flushing some of the nutrients out of the pond. If the grass in fertilized, and you get a heavy rain, the surface runoff from the lawn looks like it might end up in the pond, contributing to the algae growth.

If it's legal, stocking Tilapia in an annual basis will help a LOT. Chemicals to use would be Cutrine Plus liquid.

Excess nutrients in the pond is the cause of the algae.