co2 regulator on a timer?

[Cerianthus]

the theory behind injecting co2 an hour before the lights on is so that you keep a constant ppm of co2 during the entire light cycle. It usually takes 40 min to an hour for you co2 diffuser to bring you co2 ppm up to your desired level which is around 40 ppm or in some cases higher.

I agree fish and plants do produce co2 but no where near the ppm a pressurized system can bring it. Again the goal is to give your plants the same conditions throughout the light cycle so that their growth is optimized.

Although understand your concept but All depends on the each individual system as no two tanks are alike. I could exceed what you recommend right before light without CO2 injection. Have lost some fish trying to find right balance for specific tank/conditions...
Distribution time or should I say time to reach optimal [CO2] also differ depending on each individual complete system/conditions. Just my thoughts..

 

[Dreamweaver]

In the wild you can't grow the lush aquascapes that we can create in our aquarium.

What ?? I take it you've never been to Florida huh ??

I agree running co2 24/7 is pointless

I don't know about that, please read this, http://www.thekrib.com/Plants/CO2/night.html , then tell me it is "pointless"

and can be stressful to fish.

I don't/can't dispute that.

:thm: Heh, all U CO-2 spend-thrifts, tell me about the price of a solenoid... and I will look into it! :lipssealedsmilie:

Ya, what he said LOL


I believe that the ph swing resulting from turning off co2 would be more stressful to fish (especially to fish like blue rams & discus) than the minor accumulation of co2 in the water at night. Again, please read the link for a better explanation than I can give.

 

[rockhoe14er]

that's a 11 year old article. I believe our understanding is far better now than 11 years ago. Also many people have planted tanks with discus and other pH sensitive fish and have no problems with the ph difference between ph on and off. It's not the pH that has a effect on fish it's the total disolved solids in the water that can cause osmatic shock in fish. Cardinal tetra's are known to be pH sensitive and are fine is numerous fish tanks where they turn the co2 off at night.

 

[cradlefan]

Was just reading Tropical Fish Hobbyist magazine. Takashi Amano has a periodical in the magazine every month...I was reading the specs of his tank...he turns his co2 off at night and aerates the tank using lily pipe P-4. I think I will do the same, at least turn it off at night I think.

 

[wesleydnunder]

What ?? I take it you've never been to Florida huh ??


I don't know about that, please read this, http://www.thekrib.com/Plants/CO2/night.html , then tell me it is "pointless"


I don't/can't dispute that.



Ya, what he said LOL


I believe that the ph swing resulting from turning off co2 would be more stressful to fish (especially to fish like blue rams & discus) than the minor accumulation of co2 in the water at night. Again, please read the link for a better explanation than I can give.

Fish have no receptors for ph and have no idea what the ph of their water is. I kept my discus in a co2-injected tank for years in which the co2 was turned off at night and the fish were fat, happy and spawning.

Mark

 

[Cerianthus]

Fish have no receptors for ph and have no idea what the ph of their water is. I kept my discus in a co2-injected tank for years in which the co2 was turned off at night and the fish were fat, happy and spawning.

Mark

Receptos?
Thow your discus in very alkaline or very acidic water and see what happens. I guess our skins can withstand exposure to very acid/alkaline water without receptors or is it that our skin has receptors so cant withstand such exposure???

btw, one of statement from manual which we considered one of backbones of aquaculture research/industry as well as medicine/pharmaceutics in general:
"Carbon dioxide (CO2) can be toxic to fish when present at concentrations >20 mg/L. "

Hope someone will utilize such finding from research rather than opinion of few although some of such opinions can/do have validity. Thus always keep one's mind open but dont deviate from what's been found from various research facilities either.

 

[Cerianthus]

Was just reading Tropical Fish Hobbyist magazine. Takashi Amano has a periodical in the magazine every month...I was reading the specs of his tank...he turns his co2 off at night and aerates the tank using lily pipe P-4. I think I will do the same, at least turn it off at night I think.

It all depends on your tank's [CO2] so dont go on aerating unnecessarily. Easy way to tell is to check if all/most fish are at top gasping for air before sunrise..

I ran small air stone, some once and some twice a night on a timer, only in a Tanks that are heavily loaded with fish/plants+Photo period CO2 inject.