Does surface of water need to "break" to oxygenated the water?
I'm thinking of getting a hydor koralia for my oscars and silver dollars tanks to revitalize the dead spots. does the powerhead need to create bubbles in order to oxygen the water? or does the surface simply need to move around?
Well... here is the deal. Water gets oxygenated simply by having contact area with oxygen(surface) but oxygen does not go deeper in to the tank and most oxygenated water is on top. now... if you create a current then water that's on top will eventually end up mixed with water on the bottom, there for oxygenating entire tank. But! It is more efficient to run air pump with air stone (IMO) So.. to answer your question... when there are bubbles of air in the water oxygenation is better.
yup. however if you place a waterpump properly, it will be fairly effective also. The difference really is if you want a current or not. Using a waterpump will create currents and some fish enjoy that. Air stones create much less of a current and serves more for aesthetics and oxygenation.
One small nit I have to pick is that airstones oxygenate via creating a very gentle current from the lower reaches of the aquarium to the top and by creating surface turbulence. The bubble stream you see is not oxygenating the water because of the bubbles. The contact time between the bubbles and the water is far too short to do much in the way of gas exchange.
but a bubble wand still generates far less current than a pump would so the amount of exygen exchange would be reduced if one chose the bubbles route correct?
It's not current, it's surface disruption.The surface of the water needs to be disturbed. However unless you're seriously overstocking your tank its not likely to be a problem. A bubble anything will help out if you're worried about it.
ya you are absolutely right.....that's why the water below the waterfalls have the highest quantity of oxygens ....and the best way to do this in your tank is to use a power filter
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