Re: CO2 injection w/ powerhead

I'm not convinced this is a very effective way to inject CO2.  I 
connected a 2L yeast CO2 reactor to a powehead--the tube from the yeast 
reactor fed the powerhead from below; the impellor was very effective at 
crushing the bubbles but they don't stay in contact with the water very 
long.  Almost immediately, they float to the surface.  As someone here 
mentioned, feeding CO2 to the impellor of a Penguin or Whisper 
powerfilter has the same problem.  The bubbles are not held in contact 
with the water long enough.  Aquaclear powerfilters are better for this 
purpose because the bubbles are trapped by the sponge, which more 
efficiently holds the CO2 in contact with the water.  I haven't used a 
canister filter for CO2 injection but it seems like this should also 
work (and many others have reported success).  

Paul Bucciaglia