Re: [APD] the impersistence of the micro bubble

[urville <urville at peoplepc_com>]

thats how i do it. i put mine through the bars on my powerhead intake 
and it chops them and sprays them and i get itty bitty bubles with ease

S. Hieber wrote:

>When I was a kid I thought the tiny bubbles looked cool at
>asked around at several stores (this is before the web) on
>how one got the tiny bubbles to occur. Several places seem
>so perpelexed by the question, you have thought I asked
>them about growing plants underwater. Finally, at one
>place, the clerk said, "That's saltwater. The tiny bubbles
>happen in saltwater.
>
>You can drop an airstone into freshwater and into "marine"
>and see a tremendous diff in bubble size. Someone else
>might explain it, but that basic see-for-yourself example
>is repeatable and the results quite consistent.
>
>Doesn't bubble formation have to do with surface tension?
>
>You can force tiny bubls with finely porous airstones or by
>forcing the gas into the vanes of a pump. As soon as the
>velocity reduces the bubbles will gather to form larger
>bubbles unless you scatter them quickly and keep them
>apart.
>
>sh
>
>--- Jerry Baker <jerry at bakerweb_biz> wrote:
>
>  
>
>>Mariano F. Bonfante wrote:
>>    
>>
>>>I talked with a marine tank representative and he told
>>>      
>>>
>>me that a venturi 
>>    
>>
>>>would give thick bubbles in this case, not the type we
>>>      
>>>
>>see in marine water. 
>>    
>>
>>>What will happen in fresh water with CO2?.
>>>      
>>>
>>I don't know. I have been personally unable to achieve
>>the small bubbles 
>>you see in saltwater. I believe this is due to the
>>density of freshwater 
>>vs. saltwater, but I'm not positive on that.
>>    
>>
>
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>  
>
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