I need help.

I just set up a 20G planted tank (60 cm), including an Eheim 2222 canister
filter, compressed CO2, and a Fluval surface skimmer. I have to put the
Eheim filter on the same bench as the tank because of space problem. The top
of the filter is about 15 cm below the water level of the tank. I notice the
filter rumbles and pumps out about 5-10 cc of gas every 15-30 min. I have no
idea when the gas is from. It can be the CO2 or the air drawn in through the
surface skimmer. I have reduced the inflow from the water surface to reduce
the air sucked in this way. However, this does not seem to reduce the amount
of gas pumps out through the outflow. Today, the filter developed an airlock
with noisy impeller and no outflow, requiring repriming of the filter.

I wonder if anyone has similar experience or can advise me how to overcome
the problem.

Many thanks in advance.

If your filter is just set up it may not be 100% filled with water ? I have
this in my canister filter usually after a couple of hours it stops. Where
is the CO2 diffuser connected to ?
Do you might have an air stone that bubbles into the intake of the filter ?
Did you try shutting it off for a couple of hours ?

gizmo
"Simon" wrote in message
...
I need help.

I just set up a 20G planted tank (60 cm), including an Eheim 2222 canister
filter, compressed CO2, and a Fluval surface skimmer. I have to put the
Eheim filter on the same bench as the tank because of space problem. The
top
of the filter is about 15 cm below the water level of the tank. I notice
the
filter rumbles and pumps out about 5-10 cc of gas every 15-30 min. I have
no
idea when the gas is from. It can be the CO2 or the air drawn in through
the
surface skimmer. I have reduced the inflow from the water surface to
reduce
the air sucked in this way. However, this does not seem to reduce the
amount
of gas pumps out through the outflow. Today, the filter developed an
airlock
with noisy impeller and no outflow, requiring repriming of the filter.

I wonder if anyone has similar experience or can advise me how to overcome
the problem.

Many thanks in advance.

On Thu, 30 Oct 2003 23:16:50 +0200, "gizmo" wrote:

If your filter is just set up it may not be 100% filled with water ? I have
this in my canister filter usually after a couple of hours it stops. Where
is the CO2 diffuser connected to ?
Do you might have an air stone that bubbles into the intake of the filter ?
Did you try shutting it off for a couple of hours ?

gizmo
"Simon" wrote in message
...
I need help.

I just set up a 20G planted tank (60 cm), including an Eheim 2222 canister
filter, compressed CO2, and a Fluval surface skimmer.

gizmo hit on the problem and simon has the source which, in my case,
was the Fluval surface skimmer... it is difficult to get these things
to NOT suck in air. I have finally given up on mine and just removed
the surface skimmer.

My HOT filter kept "drying" out... water levels in the filter would
start out just fine but in less than 2 days the filter would be almost
completely dry.... water still pumping in and out, but VERY noisy and
lots of air mixed with the outflow...

Those darned adjusters on the Fluval surface skimmer do not seem to
work very well... water is either flowing very fast down the intake or
not flowing at all... when the water flow is faster, you get a large
intake of air as well.

Note: I also tried that skimmer on my Fluval 303 filter and had the
same problem you had, where the filter just locks up with too much
air.