Re: [APD] carbo plus units and kh

[Rex Grigg <rex at rexgrigg_com>]

Jerry Baker wrote:

>Derek Parr wrote:
>  
>
>>We've been discussing on my local aquarium group list on how much more 
>>CO2 gas is lost using normal air tubing compared to that special "CO2" 
>>tubing they sell.
>>    Any opinions on the matter?
>>    
>>
>
>I don't know about that, but I can tell you that regular old 1/4" HDPE 
>tubing (think R/O line) fits right over airline tubing barbs and is 
>probably impervious to gases at all.
>
>  
>
Refer to this chart.  Then decide what normal airline tubing is.

http://www.coleparmer.com/techinfo/techinfo.asp?openlist=D,E,C&htmlfile=SelectingTubing%2Ehtm&Title=Search

Silicone is about the worst you can use.  Vinyl is good but breaks down 
quickly.

I use Polyurethane.
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