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Re: [APD] Aqua medic co2 reactor 500
This is probably pretty obvious, but how are you telling if the reactor is
addig CO2 to the water?
On 23/09/2007, Timur Aydin <ta at taydin_org> wrote:
> I have an aqua medic co2 reactor 500, which I am trying to use to add
> co2 to my 35 gal planted tank. However, so far I am not successful. The
> thing just doesn't seem to add any co2 to the water. If I just stick an
> airstone to the end of the co2 hose, that seems to add more co2 at the
> moment :) I have read the manual several times over and I am still at a
> There are several possibilities that I am trying to address:
> 1) The user's manual says on one place that the reactor requires a water
> flow between 500 l/h and 1000 l/h (about 125 gal/h and 250 gal/h). In
> another place, the manual says that a minimum flow of 100 l/h is
> required (25 gal/h). I have tried attaching the reactor to the clean
> water return of my eheim 2213. I have also tried using a powerhead
> rated at 150l/h - 1200 l/h. In all settings, the reactor eventually
> fills up with gas and the drop checker is solid blue (no co2).
> If I use a high flow rate (around 1000 l/h), small gas bubbles come
> out of the bottom of the reactor and these bubbles go to the water
> surface without having been dissolved. Occasionally, a gas bubble
> reaches the outer spiral, moves down slowly and then stops
> there. Other bubbles follow after some time and they all collect in
> the spiral, until eventually the spiral is full with gas.
> The manufacturer of this reactor also has a product, which uses this
> reactor together with an integrated power head. The power head is
> rated at 300 l/h (75 gal/h), so I am really suspecting the manual is
> not correct when it says 500 l/h - 1000 l/h is required.
> I also found a discussion on this mailing list:
> which recommends a lesser flow of water. But in any case, whatever
> flow I use, the co2 just collects in the reactor and isn't dissolved.
> I am suspecting that some of the water just leaves from the bottom of
> the reactor instead of being redirected to the spiral. I have felt
> the bottom and there is some water flow there. Can it be that the
> pieces inside the reactor don't sit on each other perfectly or there
> is a washer required, which my unit doesn't have?
> 2) The german manual says that the small white cap should be put on the
> pipe opening on top of the reactor. The english manual does not say
> that, so I am not sure which one is correct. I have tried both and it
> seems if the white cap is off, co2 bubbles escape from the top of the
> reactor. So I guess the german manual is correct :)
> Anyway, if someone is using this reactor, I would really appreciate some
> insight on how to further troubleshoot.
> Timur Aydin
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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