Co2 Day vs Night

[hatchet]

For the past 6 months I have been having problems keeping my shrimps (Yamato especially) alive. I thought it was the Temperature, Nitrate levels, Phosphate, Ph Kh levels etc.

My fishes has no signs of breathing problems as my Co2 is on a timer and switches off when my lights are out. But little did I know that the Co2 in the tank is just too high for my shrimps but not for my fishes.

Recently, I installed a small air pump that comes on when my light goes out, my shrimps are now survivng very well.

Anybody with the same experience?

[hatchet]

For the past 6 months I have been having problems keeping my shrimps (Yamato especially) alive. I thought it was the Temperature, Nitrate levels, Phosphate, Ph Kh levels etc.

My fishes has no signs of breathing problems as my Co2 is on a timer and switches off when my lights are out. But little did I know that the Co2 in the tank is just too high for my shrimps but not for my fishes.

Recently, I installed a small air pump that comes on when my light goes out, my shrimps are now survivng very well.

Anybody with the same experience?

[hatchet]

For the past 6 months I have been having problems keeping my shrimps (Yamato especially) alive. I thought it was the Temperature, Nitrate levels, Phosphate, Ph Kh levels etc.

My fishes has no signs of breathing problems as my Co2 is on a timer and switches off when my lights are out. But little did I know that the Co2 in the tank is just too high for my shrimps but not for my fishes.

Recently, I installed a small air pump that comes on when my light goes out, my shrimps are now survivng very well.

Anybody with the same experience?

[hatchet]

For the past 6 months I have been having problems keeping my shrimps (Yamato especially) alive. I thought it was the Temperature, Nitrate levels, Phosphate, Ph Kh levels etc.

My fishes has no signs of breathing problems as my Co2 is on a timer and switches off when my lights are out. But little did I know that the Co2 in the tank is just too high for my shrimps but not for my fishes.

Recently, I installed a small air pump that comes on when my light goes out, my shrimps are now survivng very well.

Anybody with the same experience?

[SuperRaY]

you may just off the co2 earlier coz if you off together with the lights, there will still be co2 in the water. turning off earlier will make the plants photosynthes and convert it into O2. (if you have a big tank + little fish = no need air pump)

correct me if i;m wrong

[vinz]

hatchet,

Whats your KH and pH? Does your plants bubble when the lights are on?

[David]

hi hatchet

i will second vinz on this....whatis your PH and KH level when you are injecting CO2 and out of curiousity what is you total light wattage and the size of your tank?

generally if your fish shows no sign of CO2 overdose, ie heavy gill breathing and hanging at the surface of the water, your shrimps shouldnt be suffering, plus the fact that they will be jumping out of your tank....(on this i could be wrong).

as for myself, i left it to my PH controller to regulate the CO2 injection and it does inject several times when the lights are off through the night.

by all means i am not saying you are wrong....but rather i just very curious....

[hatchet]

Hi Vinz, my KH4, PH 6.5 and my plants bubble like mad after 4 hours of light. My light and co2 duration is 8 hrs.

[David]

hi hatchet...you KH to PH is correct and there should not be a shortage of dissolved O2. did you check your NO2 or NO3 level recently? Just like to check what kind of filter you are using and the position of the outlet pipe. I am thinking that perhaps there is a circulation problem.

[PeterGwee]

Yamatoes are more sensitive to CO2 overdose than first and they will be the ones that react to CO2 overdose faster than fish. But as Simon says..if your fish ain't suffering I really don't see why your shrimps are? I had my CO2 off with my lights as well..no problems here. Maybe you can try measuring your pH 1 or 2 hours after lights off to see how much your left over CO2 in the tubings had cause your pH to drop.

[hatchet]

Thanks guys,

Will try it out tonight and let you guys know the outcome.
cheers.

[sherchoo]

During lights off period plants would go to respiration mode whereby they will asorb O2 and releases CO2. It could be this reason why the It CO2 is on the high side at night even though the external CO2 is stopped. This is esp true if your bioload is high.

Me experienced it myself.