keeping co2 in contact with the water longer?

[krap101]

what would happen if you diffused the co2 under the sand/gravel? the bubbles would have to fit through small places so maybe break down more? or keep it underwater longer so you'll have a better saturation rate?

 

[Guest]

I tried this for a couple days. The Co2 gas builds a pocket under the sand until it erupts in a large bubble. Mine would even shoot some sand up in the tank. The bubble simply disperses into the air, losing most of the Co2. I thought it would diffuse through the sand, and maybe some did, but not enough to warrant diffusion by substrate. It didnt work for me. A powerhead diffuser is the way to go.

 

[7Enigma]

Agreed. This would just create more problems and would probably offer less dissolved CO2 in the water. It also might create NASTY anaerobic pockets.