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Old 08-04-2003, 03:44 PM
AlgaeGrower
 
Posts: n/a
Default Dupla Reactor 400 problem

Good day

My name is Gabriel and I am living in Romania.
I am posting here with the hope that someone can
help me with my Dupla co2 system.

I have purchased two weeks ago a Dupla Delta S set which has,
as you probably know, also a Reaktor 400 included but I do
not seem to make make it work properly.
I read the instructions manual hundreds of time hoping that
I have missed something essential.

My current setup is - Dupla co2 bottle of 1kg , Dupla bubble
counter filled with glycerine, Dupla co2 long term test, Dupla
Reaktor 400 with the 6th hole unplugged, a Hagen powerhead
with adjustable flow from 0 to 450 liters per hour connected
to the reaktor only, 1 bubble every 6seconds. My aquarium
is 80 x 30 x 40cm - 96liters - abt 80liters net,ph 8.5, kh 8.

After one week while the co2 was continously on - day and night -
the Co2 test still shows the blue color.

I am absolutely sure that I have installed the reaktor correctly
i.e. completely immersed (actually abt 5/6 cm bellow the surface),
the water goes through the black hose in the central chamber (the
one with the minicaskade inside),the co2 goes in the 1st lateral
chamber and the 6th capacity hole is open/unplugged.

My problem is that if I decrease the water flow through the reactor
and also the bubble rate (I have succeeded to adjust even down to 1
bubble every 15seconds) some bubbles still escape through the 6th
capacity hole in the reactor. If I increase the water flow keeping
the same bubble rate or increasing it a bit some gas in the central
chamber is pushed down and out of the reactor through the lower screen.

I have tried to turn on both the water and the co2 in the same
time or first to fill the reactor with gas and then to turn on
the water but the result was the same.

When I have received the package the co2 bottle was filled
with gas. I have not done any test to see if it is co2 inside
but I do presume that it cannot be filled with another
gas as it has a special valve thread used only for co2.
I am telling you this because it looks that, no matter what approach
I am using, I am losing too much gas and the color of the co2
test does not switch to green which means that there is not enough
co2 disolved in the water.

Thanks beforehand for your help.

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Old 08-04-2003, 04:44 PM
350X_Rider
 
Posts: n/a
Default Dupla Reactor 400 problem

Gabriel, I surely hope someone can help you, I am sorry that I cannot...

I just wanted to say, I'm glad you have a sense of humor with your nickname,
AlgaeGrower... that's very cute.... I've not seen such a good sense of humor
around here in a while... pretty neat....

Good luck...

"AlgaeGrower" wrote in message
om...
Good day

My name is Gabriel and I am living in Romania.
I am posting here with the hope that someone can
help me with my Dupla co2 system.




  #3   Report Post  
Old 08-04-2003, 09:56 PM
 
Posts: n/a
Default Dupla Reactor 400 problem

My current setup is - Dupla co2 bottle of 1kg , Dupla bubble
counter filled with glycerine, Dupla co2 long term test, Dupla
Reaktor 400 with the 6th hole unplugged, a Hagen powerhead
with adjustable flow from 0 to 450 liters per hour connected
to the reaktor only, 1 bubble every 6seconds. My aquarium
is 80 x 30 x 40cm - 96liters - abt 80liters net,ph 8.5, kh 8.

After one week while the co2 was continously on - day and night -
the Co2 test still shows the blue color.


Measure the pH vs kH.
This is better than the visual test you have. See pH/KH/CO2 table at
www.sfbaaps.com under "references". Follow over to the pH over you'll
need for a CO2 level of 20-30ppm range for the KH of 8. About 6.9-7.0
or so is good.
Now add only CO2 to do this.

You can add more bubbles per second or increase the flow rate through
the reactor. Might want to plug all the holes on the reactor for now.

My problem is that if I decrease the water flow through the reactor
and also the bubble rate (I have succeeded to adjust even down to 1
bubble every 15seconds) some bubbles still escape through the 6th
capacity hole in the reactor. If I increase the water flow keeping
the same bubble rate or increasing it a bit some gas in the central
chamber is pushed down and out of the reactor through the lower screen.


Try this, fed the bubble into the powerhead's intake instead and tie
off the reactor's CO2 input.
This way the water and gas will be atomized by the pump first then
shot over the media inside the chamber.
Plug the last 6 th level hole up etc.

This size reactor should have enough capacity for your small tank.

I have tried to turn on both the water and the co2 in the same
time or first to fill the reactor with gas and then to turn on
the water but the result was the same.


Don't worry about day to day fluxes in the reactor. Some drop is going
to happen but overall just make sure the pH is in a good range all day
length long.

When I have received the package the co2 bottle was filled
with gas. I have not done any test to see if it is co2 inside
but I do presume that it cannot be filled with another
gas as it has a special valve thread used only for co2.


That's very unlikely.

I am telling you this because it looks that, no matter what approach
I am using, I am losing too much gas and the color of the co2
test does not switch to green which means that there is not enough
co2 disolved in the water.

Thanks beforehand for your help.


Regards,
Tom Barr
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Old 09-04-2003, 03:56 PM
AlgaeGrower
 
Posts: n/a
Default Dupla Reactor 400 problem

"350X_Rider" wrote in message ...
Gabriel, I surely hope someone can help you, I am sorry that I cannot...

I just wanted to say, I'm glad you have a sense of humor with your nickname,
AlgaeGrower... that's very cute.... I've not seen such a good sense of humor
around here in a while... pretty neat....

Good luck...

"AlgaeGrower" wrote in message
om...
Good day

My name is Gabriel and I am living in Romania.
I am posting here with the hope that someone can
help me with my Dupla co2 system.


Thank you very much for your message.
I use this nickname in the memory of the last two years
when I was experincing several outbreaks of various forms of algae
and started to consider myself as the most experinced algae grower.
Although now I have reached a certain balance I will still use
this nick as it reminds me of all the mistakes I've done.
Thanks for your wishes.
  #5   Report Post  
Old 09-04-2003, 09:20 PM
AlgaeGrower
 
Posts: n/a
Default Dupla Reactor 400 problem

Thank you very much indeed for your reply sir.

I will definitelly try tonight the 1st suggested approach i.e. to
plug the last hole. If this does not work I will also try to feed
the gas into powerhead's intake and then to run this co2 enriched
water into the reactor.

Yesterday evening I have adjusted the powerhead's flow so now it
is running, I believe, at its full capacity (abt 450Liters/h)
increasing also the bubble rate to approx one bubble each second.
This morning I have noticed a slight decrease in ph down to 8.0
(most probably because the plants did not consume any co2 at night).
I did not have time to check again the ph this evening
when I arrived home but I have noticed a slight change in color
on the co2 test. The gas stays just above the last hole but some,
from the central chamber, is still pushed down and out of the
reactor. This does not matter as long as I have enough gas disolved
into the water (will see how much when I can measure the ph).

One more question - should I try to decrease the carbonate hardness
using some reverse osmosed water at each weekly change. I believe
that this would help achieving quickly the desired co2 concentration
and reduce the amount of gas needed to achieve this optimum
concentration. What should be the proportion of reverse osmosed
and tap water?

Thanks again.

Gabriel
aka The AlgaeGrower





) wrote in message om...
My current setup is - Dupla co2 bottle of 1kg , Dupla bubble
counter filled with glycerine, Dupla co2 long term test, Dupla
Reaktor 400 with the 6th hole unplugged, a Hagen powerhead
with adjustable flow from 0 to 450 liters per hour connected
to the reaktor only, 1 bubble every 6seconds. My aquarium
is 80 x 30 x 40cm - 96liters - abt 80liters net,ph 8.5, kh 8.

After one week while the co2 was continously on - day and night -
the Co2 test still shows the blue color.


Measure the pH vs kH.
This is better than the visual test you have. See pH/KH/CO2 table at
www.sfbaaps.com under "references". Follow over to the pH over you'll
need for a CO2 level of 20-30ppm range for the KH of 8. About 6.9-7.0
or so is good.
Now add only CO2 to do this.

You can add more bubbles per second or increase the flow rate through
the reactor. Might want to plug all the holes on the reactor for now.

My problem is that if I decrease the water flow through the reactor
and also the bubble rate (I have succeeded to adjust even down to 1
bubble every 15seconds) some bubbles still escape through the 6th
capacity hole in the reactor. If I increase the water flow keeping
the same bubble rate or increasing it a bit some gas in the central
chamber is pushed down and out of the reactor through the lower screen.


Try this, fed the bubble into the powerhead's intake instead and tie
off the reactor's CO2 input.
This way the water and gas will be atomized by the pump first then
shot over the media inside the chamber.
Plug the last 6 th level hole up etc.

This size reactor should have enough capacity for your small tank.

I have tried to turn on both the water and the co2 in the same
time or first to fill the reactor with gas and then to turn on
the water but the result was the same.


Don't worry about day to day fluxes in the reactor. Some drop is going
to happen but overall just make sure the pH is in a good range all day
length long.

When I have received the package the co2 bottle was filled
with gas. I have not done any test to see if it is co2 inside
but I do presume that it cannot be filled with another
gas as it has a special valve thread used only for co2.


That's very unlikely.

I am telling you this because it looks that, no matter what approach
I am using, I am losing too much gas and the color of the co2
test does not switch to green which means that there is not enough
co2 disolved in the water.

Thanks beforehand for your help.


Regards,
Tom Barr



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