Re: [APD] Re: CO2 into HOT Magnum

[revance at indiana_edu]

I'm not an expert on the subject, but I would think the micron filter would be 
excellent for diffusing CO2. It would force the CO2 to remain in the filter 
longer (it won't let big bubbles pass through). The thing I can imagine might 
cause a problem is the micron filters get clogged so quickly and the water 
flow slows way down. I'm curious to hear others opinions.


Quoting Jon Passmore <pdxfishguy at yahoo_com>:

> Thanks for the tips.  I currently have my co2 going to a Hagen bubble
> diffuser.  The bubbles get smaller on the way up, but I still lose about half
> of the bubble when it reaches the top and heads for the surface.
>  
> I am going to try a micro-bubbler under the diffuser to reduce the size of
> the bubbles.  I'll let you know if that works out.
>  
> Also, on a HOT Magnum in a planted tank, is it a good or bad idea to leave
> the micron filter in it (polisher)?  I've heard both ways, so I would like
> more opinions on that too.
>  
> Jon
> 
> David Grim <grim1214 at bellsouth_net> wrote:
> (snip)
> Does anyone have an opinion on bubbling co2 into the intake on a HOT Magnum
> filter? Any problems or issues I should worry about?
> 
> I'm thinking about putting a micro-bubbler on to make the bubbles as small
> as possible then let the intake suck them up and finish the job.
> 
> Your advice/opinions are appreciated.
> (snip)
> 
> Jon,
> 
> You can do it no problem. You will use more CO2 (probably much more) than
> you would with a traditional reactor setup or even a cannister injection
> setup using an Eheim or Fluval. Problem with the HOT is no contact time. It
> pulls it in and shoots it out.
> 
> The HOT is designed to purge excess air in the filter and there is no reason
> it wouldn't do it with CO2 as well.
> 
> I think the main issue using a HOT is the inefficiency of the setup more
> than whether it can be done.
> 
> Of course, let me add the usual "CO2 is cheap" comment. The biggest time
> waster IMO is pulling the empty tank and driving to the supplier for a
> swapout. A swapout in the Atlanta area costs me about $13 for a 20# tank. So
> I guess there is something to say for efficiency. The more efficient your
> injection system is, the farther between swapouts you are. I like my tanks
> to last as long as possible.
> 
> If you inject at a continuous rate 24/7, or are tied into the light timer,
> the more efficient your system is means you'd reach the desired CO2
> concentration faster and you could throttle back your bubble rate and the
> tank would last longer.
> 
> If you use a controller the controller will switch the gas off quicker the
> more efficient your injection is, and the tank will last longer that way as
> well.
> 
> Dave
> 
> 
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