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CO2 & PH Controllers
" wrote:
This is really interesting. In between my last post and this, I was up at a fish store that told me about a fish die-off they attributed to not turning off the CO2 at night. I looked at their tank: needle valve, no cover, lights suspended 8 inches above the tank, no chance of CO2 being trapped above the water and displacing O2. That would not occur anyway. Tom, I'm sure we've both seen the case where a tightly fitting hood on a CO2 injected tank caused CO2 buildup. The outgassing CO2 gets trapped in the enclosed air space above the water, and prevents sufficient O2 from diffusing in. The common solutions are to open air gaps in the hood or install airstones. It happened he http://www.tactics.com/d/svas/sam.html The tank on the left is CO2 injected. The hood is tightly sealed. An airstone solved the problem. The tank on the right is not CO2 injected, and did not have problems. |
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