Pond Boss Forums AERATION Systems questions Areation?

^^ What he said^^

With what you are describing, you've got to balance out the amount of surface area that contacts the air by how much GPM flow restriction the little holes create vs. the open upturned end.

It would be a very easy question to answer if you had a DO meter, but for your standard pond owner, it's a pretty pricey piece of equipment for the amount of time that it'd be used.