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Re: placement of Eheim diffuser/reactor

In a message dated 11/01/1999 3:57:51 AM EST, Aquatic-Plants-Owner at actwin_com 

<< Originally I placed my Eheim diffuser/reactor at the bottom near my 
 intake.  I then read in Aqua Journal Vol. 33 that this specifically should
 not be done so I moved it to the bottom of the tank on the other side away
 from the canister intake.  Unfortunately, Aqua Journal did not give any
 reason for their recommendation so one can only speculate as to the validity
 of this suggestion.  Personally, I have not noticed much of a difference.
 The only reason I can think of for the recommendation would be that the
 return for the canister is near the top (at least in my tank) and the CO2
 should be injected near the bottom.  Since the article also suggests using a
 power head to increase circulation, I do not think the author is worried
 about the adverse effects of the circulation induced by the canister filter.
 In fact this statement seems to support my thought that the canister return
 may be to high to adequately circulate the C02 near the bottom.
 - -brian
Peter at House of Fins in Greenwich CT (an amazing LFS) told me that the 
problem with putting the CO2 reactor/diffuser near the canister filter intake 
is that this results in increased CO2 levels inside the filter which inhibits 
growth of the nitrifying bacteria.  Linc Duffy, Pleasant Valley, NY