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Re: Needle valves in CO2 systems poll

Chuck Gadd wrote:
<<<> 6)What cV flow rates do you use?

??? 2 to 3 bubbles per second, if that's what you're asking.

Hehehehehehe... oopss... for people taking the poll after this just ignore 
the last question. There IS  a way to figure out what your flow rate is by 
the turns used to "open" the valve. It should say on the spec sheets of 
whatever company you get your valve from.

So far there have been only 4 responses including an off-list response from 
Erik Olson. The most impressive numbers that I've gotten are 9 years of 
using a valve without any problems other than fluctuations in delivery with 
fluctuations in temperature. Anyone else experience this? If so, how "bad" 
was the problem? I know Dave Gomberg has rattled on about temperature 
"damage" on valves but exactly how "bad" is this problem from people's 
experiences? I've heard one solution to this problem that sounds like a very 
logical approach to me - just tape the needle valve to the outside aquarium 
wall and you have a steady temperature. Math put aside Dave, it seems like 
people are getting the desired rate of CO2 into their aquariums with valves 
installed. Anyone else care to answer the poll?? The more responses we get 
the better.

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