sworrall
September 8th 05, 12:20 PM
KStringer Wrote:
> Sworrall,
>
> Why are you injecting CO2 at night? You should be injecting CO2 during
> lighted hours in order to facilitate photosynthesis. At night, plants
> go into respiration in which they use oxygen instead of CO2. When you
> inject CO2 into the tank, your PH will drop because CO2 creates
> carbonic acid, which will bring down your PH. If you do not want your
> PH to drop, you may wish to add a buffering agent, or you may wish to
> do more frequent water changes, though based on your GH and KH, water
> changes aren't really going to help you much.
>
> ....as I read your post again, it sounds like the problem you are
> having
> is that as soon as the lights go on, your PH reading changes and this
> also occurs as soon as you turn the lights off. If this correct? If it
> is, I would hazard that your PH meter is faulty.
>
> Hope something that I said helps, but I'm no expert so maybe someone
> else can offer better advice.
When you have a ph controller you let that control the dosing of co2 so
you leave the co2 open 24/7. When I didnt have a contrller the co2
would shut off at night with the lights via a solenoid. I have been
told and the instructions state that with a controller you let that
control the dosing all day and night.
I think in theory the co2 wouldnt usually run at night when using a
controller due to fish respiration etc. this is why I have a problem in
that the ph rises at night and falls in the day.
stu
--
sworrall
> Sworrall,
>
> Why are you injecting CO2 at night? You should be injecting CO2 during
> lighted hours in order to facilitate photosynthesis. At night, plants
> go into respiration in which they use oxygen instead of CO2. When you
> inject CO2 into the tank, your PH will drop because CO2 creates
> carbonic acid, which will bring down your PH. If you do not want your
> PH to drop, you may wish to add a buffering agent, or you may wish to
> do more frequent water changes, though based on your GH and KH, water
> changes aren't really going to help you much.
>
> ....as I read your post again, it sounds like the problem you are
> having
> is that as soon as the lights go on, your PH reading changes and this
> also occurs as soon as you turn the lights off. If this correct? If it
> is, I would hazard that your PH meter is faulty.
>
> Hope something that I said helps, but I'm no expert so maybe someone
> else can offer better advice.
When you have a ph controller you let that control the dosing of co2 so
you leave the co2 open 24/7. When I didnt have a contrller the co2
would shut off at night with the lights via a solenoid. I have been
told and the instructions state that with a controller you let that
control the dosing all day and night.
I think in theory the co2 wouldnt usually run at night when using a
controller due to fish respiration etc. this is why I have a problem in
that the ph rises at night and falls in the day.
stu
--
sworrall