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hey , im just wondering why when my powerhead goes deeper into the tank water does the air injection reduce and then stop? incredibly annoying.
any help would be gladly appreciated, thanks

theres no holes in the air inlet tube but somehow water still seems to get into the tube and stop the air flow.

I cant work it out !

What sort of powerhead is it? If you post that hopefuly someone who uses that powerhead can offer some advice on what it could be.

Are you sure the lines not blocked or anything?

p.l.u.r
Matt

Cake > Pie

The deeper you go the more pressure you have to over come. So sucking air down becomes harder.



Dan

Why are you injecting air bubbles into a marine tank anyway?

Many fish only tanks will do that. I add air to my Qtank as well.



Dan

You can put an air pump and a check valve on the air line to force air through...you might also want to add a simple screw valve to adjust airflow, as too much can cause the air to go the wrong way and stop your pump...

You are effectively counting on the venturi effect with the other approach....that is, the momentum of the effluent from the pump "drags" air through the venturi valve and "injects" it into the water...

When you go deeper, there is more resistance to the flow of air through that valve...you can overcome this with an air pump...

Bubbles bad. Take that hose off and just make sure you have some surface Agitation.

Bubbles aren't really "bad", they're just ugly. Remember, the waves in an ocean create billions of micro-bubbles.

My surface skimmer injects micro-bubbles into my tank when I knock around in there. It's really annoying and ugly. They stick to everything.

Just get some surface agitation like Azizza said. You will be fine.

Actually bubbles can cause some problems with certain corals. But yes beyond that they are just an eyesore.

Actually, bubbles really aren't a problem.

Myth 14: Microbubbles are to be avoided.

Many aquarists go to some considerable lengths to baffle sumps and pump flows to prevent small bubbles from being returned into the display tank. It has been suggested that such bubbles represent an irritation to fish, corals and other invertebrates and that they should be avoided. To be honest, I am unsure from where the origin of this perception came. However, it is untrue. Even the name is inaccurate the prefix "micro" would refer to bubbles too small to see.

The onslaught of bubbles from this oncoming wave should make it apparent that corals and coral reefs exist just fine with the presence of air bubbles in the water.
Small bubbles are very common in tumultuous reef environments, and areas where waves break are often dense with both reef life and small bubbles. In addition, in tanks and on reefs, many bubbles of various sizes, including true "microbubbles" are produced by photosynthesis, and this is especially the case in highly illuminated environments. In my own aquaria, a constant rise of bubbles, especially in the afternoon, are produced by various corals and algae in even some of my less-illuminated systems. Larger bubbles frequently get sucked into pump intakes, and are chopped up to even smaller sizes and distributed throughout the tank. I won't even begin to discuss the massive numbers of bubbles produced by various surge devices. These water motion devices have great benefits in aquaria, and even as anecdotal aquarium observations, I have never seen anything disturbed, irritated, or harmed by the rush of bubbles.

Potential: Relatively harmless. Neither bubbles nor the lack of them in a tank is likely to endanger the health or survival of organisms.