12-08-2010, 06:18 AM
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Originally Posted by VTonic
I asked the same question a while back and the conclusion that my research led me to was that they are not necessary. I personally still use them though because they do have a use. It seems the main thing that they do is to keep the water from "layering", meaning that it keeps the water column more active so you donít end up with different water temperatures or parameters in different areas of the aquarium. This only really becomes an issue with the larger aquarium sizes. I currently have 3 aquariums in my home 125 gallon, 25 gallon, and a 10 gallon. All 3 have more than adequate filtration on them, actually more than they need but as I stated I use air stones in all 3 of my systems for 2 reasons, 1 being I just like the look of it, and 2 being that they canít possibly hurt anything by being there so why not have them if they do serve some purpose even if it is unnecessary? Just my 2 cents. If anyone else has some insight to this question as well I would love to hear it, or if anything Iíve said here is inaccurate then please speak up, I would hate to be giving out bad advice VTonic
My thoughts are similar. Airstones can help disperse heat more evenly ,and perhaps help move water possibly lower in dissolved 0xygen from the bottom of the tank to the top in marginally filtered aquariums.
I run sponge filters in all but planted tank.