Stupid Question

[shrimply]

Say you had a small tank with no fish and plenty of light. For fast plant growth to produce plants for a main tank what is the maximum CO2 levels they can take. As far as I am aware the 30ppm limit is for the fish not plants. Is there a limit.

I am not in this situation just wondered. I have plants on the brain at the minute.

 

[Jen]

I don't know if there is a max rate... however, you have to have the lights, co2 and ferts at equal levels so that you don't get algae growth. It would probably just be something you would have to play with.

 

[DaveW]

I think I remember someone saying that co2 over 40 ppm stops algae growth. I might be wrong, so please check. But remember that plants do not need co2 after lights out.

 

[Waterloo Kid]

I'd guess that without fish the limit for CO2 will be due to the acidity of the water. Plants must have a lower pH limit, just like fish.

WK

 

[akudewan]

I'd guess that without fish the limit for CO2 will be due to the acidity of the water. Plants must have a lower pH limit, just like fish.

WK

What if he used calcium carbonate or something to raise the pH ? Would the CO2 levels go down automatically ?

 

[akudewan]

Anyone? I really need to know, because I have crushed shells in my substrate.