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Predator Rob

Airation of marine tank water

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Good question and also one that I'm not able to answer...

Are you running a trickle filter or refugium?

Trickle filter by itself does enough re-oxygenation assuming correct water levels (most biomedia above water level)...

I haven't played with a refugium style filter so I really have no idea there...

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All you need is surface agitation mate. The bubbles themselves diffuse a tiny amount of oxygen into the water, whereas the surface agitation allows much larger amounts of water to diffuse in to your tank water. So really all an aerator is doing is providing that aeration.

So, as long as you can actively see your surface water moving you will have no need for other forms of 'aeration'. If you cant, I personally think you will be better off using a power head to create the surface agitation over using an aerator and air stone to do it. Because of the salt being splashed around by the aerator as mentioned by oldmate.

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