Homebrew PCBs

I once tried pin holes in PVC tube, but the bubbles always come 
out big compared to air stones. I think they air needs to pass 
through all those small cavities for it to make small bubbles.
When experimenting its always a good idea to use a bucket of 
water first.

Adam

grantfair2001 wrote:
> Yip, that's the one. I asked the clerk what it was made of but she
> didn't have a clue (or seem likely to get one anytimew soon, either).
> 
> I thought I would just get some more of the surplus tygon tubing I am
> using now to feed the sparger. This is the yellow tubing intended for
> automobile use, like gasoline etc., but it is only 50 cents a foot. I
> thought I would put some holes in it with a hot needle and plug one
> end with some PVC rod. If that fails I will follow up on your
> suggestions which are excellent, as usual.
> 
> Thanks,
> Grant
>  
> --- In Homebrew_PCBs@yahoogroups.com, Adam Seychell
> <adam_seychell@y...> wrote:
> 
>>
>>grantfair2001 wrote:
>>
>>>After about 24 hours, the 12" airstone is mushy...
>>
>>Damn, well there goes that idea out the window.
>>Was this the one you got ?
>>http://www.quickgrow.com/images_shop/aqua_fizz_12.gif
>>
>>I spent some time looking for air stones and gas dispersion 
>>tubes. The closest thing I found was the porous hose used for 
>>irrigation. The stuff I got is 1/2" ID and made from recycled 
>>plastic and rubber, and appears to be acid very resistant. I want 
>>to know what people use industrially.
>>
>>For the lab you can get fritted glass on the end of a tube. But 
>>these are expensive.
>>
>>Try phoning hydroponics stores because they may have bigger range 
>>and variety. Ceramic air stones are commonly available, which I 
>>have never tried myself. Other people to try are in the water + 
>>sewage treatment industry. They may able to help. Just ask for 
>>fine bubble air diffuser.
>>
>>Here is some stuff I found on the web.
>>
>>http://southernaquaculturesupply.com/catalog2002/aeration/019.shtml
>>http://www.redvalve.com/Products/Air_Diffusers/Tubeflex.html
>>http://www.netpets.com/fish/reference/saltref/diffuser.html
>>http://www.vertexwaterfeatures.com/air6.html
> 
> 
> 
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