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Re: Cannister filter CO2 reactor
On Thu, 11 Jan 2001, Jay Reeves wrote:
> I have been using a Magnum 350 cannister filter as a reactor with the
> CO2 bubbling into the intake tube.
Me too, for about 2 months on one tank.
> I have been having problems with a bacteria bloom also.
Not me. I have other problems with it, though.
> When I mentioned my CO2 / cannister filter reactor to someone at the
> LFS he said he would be concerned about the CO2 inhibiting biological
> bacteria. Like a cylinder dumping and stressing fish? Can someone tell
> me if this could be a problem?
I would hope that you're not depending on a Magnum 350 as a biological
filter. If you aren't, then it shouldn't make a difference. Low pH
(which might happen) can inhibit nitrifying bacteria. CO2 isn't a
problem, and high O2 from photosynthesis should accelerate nitrification.
Measure the pH of the water return from the filter. If it's 6.5 or higher
then I don't think you have much to worry about.
> Also, will the beneficial bacteria consume a white cloudiness in the
> water - assumed to be a bacterial bloom? Seem to also have green algae
> in the water. Visibilty is extremely poor! However, the plants are
> growing like crazy.
What sort of filter media are you using? I stuff the media chamber
(usually used for activated carbon) with polyester filter floss, and it
actually does a better mechanical filtering job than the micron filter.
> I would like to get this cleared up soon because plants need pruning and
> I can't see enough to do it. LFS guy tested a product he thought was
> potassium permangenate (sp.?) . This did congeal the cloudiness in a
> sample of water, however, he was reluctant to sell it until I have
> exhausted all other possibilities because it would be hard on the
> plants. 75 gallon was set up 12/1/00 - Mollies & Ottos only - no
Potassium permanganate is a toxic, aggressive oxidant. Stay away from it.
Probably you should just wait a bit longer. If you get desperate you
might try adding a flocculent (several brands, available from at least
some LFSs). Take care though. The flocculent can quickly plug Magnum's
micron filter. Try the filter-floss thing.
> A while back someone, Tom Barr I think, made a comment about learning
> new things all the time in this hobby, especially about plants. I had
> been thinking earlier the day that post appeared that perhaps what I am
> going to learn is - what kind of person am I? Do I have the patience
> and the perseverance? :-)
Being stubborn and negligent might work too :)