Pond Boss Forums AERATION Should I aerate? Anatomy of an oxygen crash, or "Am I Willie Mays, or Jose Canseco?"

Bruce this is not Blue-Green Algae, which I assume you meant Cyanobacteria kind?

It really looks like tiny dots suspended in water, until it froth to the surface with glow in the dark green and whiteish hue. A bit like if paint was floating on the water...
Not the blue green kind, just plain old algae about to rise to surface to complete its cycle of reproduction.

As of today, 80 public lakes are closed by authorities here in Quebec due to BGA.

On another note, if you are pushing the limit of fish production in your pond, have you thought of using beneficial bacteria to eat the excess nutrients from fish digestion? Of course, I would only recommend it with bottom aeration as bacteria will migrate to a substrate to do their job, and DO levels are also important for them. Those friendly bacteria will love the roots under the islands. In fact you can expect about 70-80% of nutrient uptake to be done with the bacteria living in the matrix and root systems of your island. Plants will uptake the rest when they are growing. When growth stops and plant concentrate their effort to seed maturing, then your nutrient uptake will be mostly done with bacteria. That is why we now choose plants that are known for their massive root system, cattails should be good for that as long as the island is large enough to hold future growth... That could be another post almost by itself!

Interesting! Gotta to go to the East Coast tomorrow, so I will read the followup in two weeks from now! Take care!