Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants FA with murky water?

I avoided this thread because the acronym FA in my line of thought could mean Fatty Acid or Fat "Butt".

Algae ramps up photosynthesis midday to point where diffusion does not remove oxygen from cells fast enough to prevent build up. Oxygen builds up forming bubbles causing some of the algae to float up to surface.

The algae is more likely than not attached to something until the sunlight acts upon it. Increasing turbidity could be one way of suppressing it. That could involve the introduction of even more nutrients. Another approach could involve making nutrients, especially those associated with bottom less available. Your Koi will not help that option because of their feeding habits.