DIY CO2 help - The Planted Tank Forum
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post #1 of 1 (permalink) Old 04-28-2019, 04:58 AM Thread Starter
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DIY CO2 help

I'm using the citric acid + baking soda in 2x 2L bottles for a small tank at 1-2 bps. It worked well the first day but I found the citric acid almost empty the next day.

The problem I found is that the baking soda is not dissolving well in the water and it sits at the bottom of the bottle; so when the citric acid goes into the baking soda bottle it does not react fast enough and it stays on top of the baking soda. Slow reaction means pressure drops and more citric acid is pumped into the baking soda bottle. I found that after shaking the baking soda bottle, the pressure went up really fast and i had to open the bottle cap to stop the bottle from exploding. I had to leave the bottle slightly open for while because the pressure kept building up.

The recipe I'm using is 1:1 baking soda:water and 1:3 citric acid:water. Any suggestions to fix this without having to manually shake the bottle every time the baking soda settles at the bottom? Will it be fine if I just leave it as it is and just let all the citric acid sit on top of the baking soda? It seemed to be ok before i shook the bottle but the pressure was slowly dropping. I'm just afraid something might disturb the bottle and cause it to explode.
Mugen13 is offline  


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