Regulating CO2 flow

[Dubby]

I have built a DIY CO2 unit and presently bubbling the gas through an airstone. I have also hooked up a "bell" system to give the CO2 more time to dissolve.

Is there any simple (read cheap )way to regulate the rate at which bubbles are introduced into the tank?

 

[Silly me]

nope

There is no real safe way to comparess gas in a soda bottle, so dont even try..

if you notice that the bubbles is a bit much try to use less yeast or more water in your next mixture.


I work mine on one 2liter bottle per 10G of water.
Currently i have 3 bottles bubbling about 3 bubbles per second and my CO2 level is between 18 and 22ppm ph 6.4

 

[Bol]

Actually, there is, if you're somewhat mechanically and electronically inclined. Check this out.

pH control for about $50. Half of which is a solenoid-driven valve -- might be a little more expensive in a DIY case, because as SM mentioned, you'd probably want it to be a "Y" valve, to bleed the CO2 into atmosphere when it's "off".

 

[Silly me]

http/www.thekrib.com/Plants/CO2/co2-rocket.html

 

[George Farmer]

Bicarbonate of Soda will regulate your co2 output. I mix bicarb to yeast at 3:1. I use the Nutrafin co2 setup which consists of approx 1 cup sugar, 1 level teaspoon (5 ml) of bicarb, third teaspoon of yeast and approx 300ml water. This gives on average 1 bubble every 5 seconds for about 4 weeks. I have 2 units in my 125 litre tank giving approx 15 - 20 mg/l co2.

 

[Dubby]

Bol, I am not that electronically inclined to try that one

SM, thanks for the warning. What ratios do you use for yeast, sugar & water?

Bicarbonate of Soda will regulate your co2 output

Hmm...sounds interesting... So does this cause the mixture to last longer?

Any idea about the chemistry behind this?