I have read on numerous occasions that water takes in oxygen when the Surface is broken, which releases an unwanted gas (cant remember which one), which is then replaced with Oxygen.

So, the air pumps we all have in our pond, simply work by sending the air bubbles up, which break the surface and allow this gasious exchange to happen.

If you see any of the lakes that the Jap Breaders have, they have what look like large fans that rotate and beet the surface, breaking it and causing the exchange.

But, earlier this year, while i was looking into getting an air Pump, Jools said something Totally different.

She said that an air pump causes ripples, which increases the surface area, which allows more oxygen to penetrate the water surface. She kinda made out like the Oxygen simply dissolves into the water, and didnt mention that the surface had to be broken.

She said that the more ripples you can generate, the more Oxygen will get into your water.

Jono said that you need to have the air right in the centre of the pond, so the ripples are not stopped by a wall, and can radiate out in all directions. This is very good advice.

So then, by either method / view, it seems that the more bubbles you have, the moreoxygen you will get. Jono has a huge ammount of oxygen in his pond that looks as though it makes the water rise a few inches out of his pond, like boiling water.

So, which one is right, or is it a combination of the two? (this later would seem right)

Cheers,

Jay

Cheers Jay
www.active.me.uk