Tropical Fish Keeping - Aquarium fish care and resources

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johnnyb 06-03-2009 09:24 PM

pet store advice - any truth to it?
I stopped at a local pet store yesterday and owner gave me some advice and i would like to know what you guys think. She said to help the nitrogen cycle along i could put air stones under the filter cartridges in the filter box and it would help provide extra oxygen to the bacteria growing on it.
Makes sense to me but i am no expert. what are your thoughts?


Mikaila31 06-04-2009 01:29 AM

It may help a little. But during the cycling process I doubt you would notice anything at all. In the most part he is right though, the bacteria we rely on is arobic(oxygen loving). It NEEDS oxygen. Your basic filter and water movement supply plenty, your fish will suffocate before your bacteria will. When provided with a oxygen rich environment the bacteria can be much denser than in a low oxygen environment. Some filters take advantage of this. For example a wet/dry filter or trickle filter will support a much larger amount of bacteria(and in turn a larger bioload) than a HOB or canister. They do this by keeping the media exposed to the air and in different manners, trickling or dripping water through the media. That way the bacteria has all the oxygen it wants and the media doesn't dry out either.

A cheaper and more common example is the biowheel. As it spins it dunks the little spoke/riffle parts in the water and spins them through the air.

My only bone to pick with these filters is that if the power goes out or for some reason the flow stops, you run a much high risk of the media being dryed out. The biowheel it not as bad, but I dislike HOB filters in general.

johnnyb 06-04-2009 08:49 PM

thanks for the reply. i do have four of the bio wheels on my tank. i think i will try it. cant hurt anyway

Oldman47 06-14-2009 12:44 PM

Air in a filter can become a quick way for a LFS to sell a replacement impeller for a filter. As long as the bubbles stay out of the impeller, it should be safe enough to do but I would expect it to be useless for speeding a cycle. There is plenty of oxygen in tank water to allow the bacteria in a filter to grow and increase their numbers so the bubbles will do nothing for that. I am sure the LFS person heard it somewhere and thought it might work so I suppose there was no harm in passing it along.

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