Pond Boss Forums MANAGING AN EXISTING POND Fertilization Green film after first time fertilizing

Henry, the experts here (of which I am not!) generally recommend fertilization in the spring when the water temps hit the mid 60s. When the water gets hot, say mid 70s plus, most of the time fertilization is not advised.

If the film is a neon-green color, you may have blue-green algae which isn't good. If so, I'd wait until it dies back before stocking. Wouldn't add any more fertilizer, either.

But the experts might totally disagree with me, it wouldn't be the first time I got something wrong.