DIY

i have a question on a DIY co2?

how much yeast, suger, and water would you sugest for me to put in a 2 litter coke bottle for a 40 gallon planted tank and please make it safe for fish and about how many day do you think untile id have to change the coke bottle and refill it with more suger yeast and water and also how can i make a bubble counter to make sure its not that much co2

I just answered your last question. I’ll post the link here as well: http://www.qsl.net/w2wdx/aquaria/diyco2.html

NOTE: Dragonfly is right about the reason these only last so long. The yeast produce the CO2 gas, but over time their waste products build up in the bottle and they can’t survive in those conditions forever.

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