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Re: Aquatic Plants Digest V6 #50

Rich, sounds to me like you have an air leak somewhere. If you take the cap
off the soda bottle and plug the air tube with your finger does the bubbling
stop after a miinute or so? If not then it's a leak. I use the duetto for
the same purpose on one of the tanks and have found that there can be some
leaks where the hard tubing goes into the filter itself, try to submerge the
filter a little deeper to see if that helps. When I setup a new bottle it
does take a little to stop bubbling because the duetto is actually sucking
the CO2 out of the bottle instead of letting the pressure build up. The
first time I used it I was concerned that it could possibly deform the
bottle making it tip over and then sucking everything into the tank. Luckily
that wasn't the case. Are there any air bubbles in the filter media itself
of the duetto? You could be drawing air out of the water itself if the
filter media is  getting clogged, this has happened to me in the past and
the duetto keeps bubbling but you can see the bubbles forming in the clear
plastic media container.

Hope that helps

Giancarlo Podio

----- Original Message -----
  a.. To: Aquatic-Plants at actwin_com
  b.. Subject: Duetto DJ-50 as CO2 diffuser?
  c.. From: "conrad harkrader" <c_harkrader at charter_net>
  d.. Date: Wed, 12 Feb 2003 12:04:59 -0500
  e.. In-reply-to: <200302121046.h1CAkHtR005829 at otter_actwin.com>



I've been using a Duetto DJ-50 internal filter as my CO2
diffuser with a DIY yeast setup.  I changed the bottle
yesterday, and had lots of problems.  After putting the
new bottle in, the Duetto started blowing bubbles in its
output constantly.  I figured mebbe a line had come loose
somewhere, but I checked them all and they seemed fine.

I put some more sealant around the two rigid tubes that go
into my DIY bubble counter, and changed the airline tube
between the bubble counter and Duetto anyways.  I left it
for an hour and came back and was still having the same
issue.  Now I've got the airline intake on the Duetto
covered and am just bubbling CO2 through an airstone.  Any
ideas what the problem might be?  Thanks!