Re: [APD] CO2 methods

["Rick Beatty" <rjb1211 at comcast_net>]

Thank you, Scott.

You had stated in a reply to a message back in 2001 your experience with
different methods and equipment and after reading it have had many of my
questions answered.  I think I will try using the intake of the canister and
if I don't get acceptable results I will make the external unit.

Part of that old post discussed regulators.  You indicated that you were
using a couple of Harbor Freight regulators successfully.  Is this the same
U.S. General unit (flowgauge regulator) that I asked about in another
message?  The reply I got from Douglas has me wondering if it should be used
in this application.  If you put a needle valve downstream of the regulator
won't you have a problem?

Rick


----- Original Message -----
From: S. Hieber <shieber at yahoo_com>
To: aquatic plants digest <aquatic-plants at actwin_com>
Sent: Saturday, December 27, 2003 5:54 AM
Subject: Re: [APD] CO2 methods


> It's normal for a cansiter filter to put out about half the
> rated flow. Fresh media cust the flow, the length of tubing
> and the fittings cut the flow, biofilm build up inthe
> tubing cuts the flow, and the detritus that collects inthe
> midea even more so cuts the flow.
>
> Still, it probably won't affect the CO2 levels so long as
> you keep things within reason. Not a lot of water flow is
> needed to maintain CO2 levels. However, if the levels get
> very low, it will mean that the filter media are gettting
> clogged and when that happen canister filters tend to suck
> in air pst the o-ring and to suck some gasses out of the
> water, causing a large bubble at the top of the canister.
> Trmally burb out of the canister but sometimes they can
> cuase the canister to lock up. But if you build an external
> reactor, you'll never go back :-)
>
> Scott H.
> --- rjb1211 <rjb1211 at comcast_net> wrote:
> > One reason I didn't want to use a canister was the
> > variation in flow rates
> > as the unit gets dirty.  I normally clean the Magnum 350
> > every two weeks and
> > the flow is very different from clean to needing service.
> >  Will that affect
> > the CO2 level?  The Fluval has a steadier flow rate but
> > the design of the
> > Magnum (impeller at the bottom) will probably work
> > better.
> >
> >
> > Rick
> >
> >
> >
> > ----- Original Message -----
> > From: S. Hieber <shieber at yahoo_com>
> > To: aquatic plants digest <aquatic-plants at actwin_com>
> > Sent: Friday, December 26, 2003 9:03 AM
> > Subject: Re: [APD] CO2 methods
> >
> >
> > > The simplest and least expensive method is to have the
> > CO2
> > > bubble into the intake of your canister filter.  some
> > folks
> > > have a problem with the canister sometimes accumulating
> > too
> > > much gas and locking up -- others do not.
> > >
> > > The most efficient and least obtrusive method is to use
> > an
> > > external reactor. You can build one yourself with a few
> > > dollars wirth of pvc parts from Home Depot of similar
> > > hardware store.
> > >
> > > A great example of a diy reactor is here:
> > >
> > > http://www.aquaticscape.com/articles/co2reactor.htm
> > >
> > > Scott H.
>
> >
>
> =====
> S. Hieber
>
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