Spike Brewing Giveaway - New v3 Kettle

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > CO2 for Aquarium Plants?
Thread Tools
Old 02-14-2013, 05:31 PM   #1
Feedback Score: 0 reviews
Join Date: Aug 2010
Location: Boise, ID
Posts: 4
Default CO2 for Aquarium Plants?

Has anybody connected their fermentation lock to their fish tank? I grow plants in my aquarium and would like to introduce CO2 to promote growth. Pressurized CO2 systems cost money, and primary fermentors make CO2. Just thinking out loud here...

Herk is offline
Reply With Quote
Old 02-14-2013, 06:23 PM   #2
Feedback Score: 0 reviews
Join Date: Jan 2010
Location: Wisconsin
Posts: 112
Liked 13 Times on 12 Posts
Likes Given: 8


I was into planted tanks years ago and used CO2 bottles, but reading on message boards like this I saw some aquarists used to ferment sugar water in 2L bottles and pipe the CO2 into their aquariums. thing is they had to keep tabs on when CO2 production was slowing and get another batch going. I imagine it would be similar.

FWIW, I'm using the same regulators and CO2 equipment for kegging and force carbing that I used on my planted and reef aquariums.

02fx4dude is offline
Reply With Quote
Old 02-14-2013, 06:40 PM   #3
Feedback Score: 0 reviews
Join Date: Mar 2008
Location: Catonsville, Maryland
Posts: 119
Liked 20 Times on 13 Posts
Likes Given: 28


Seems like the co2 output from a batch of beer might be very high for a very brief period of time, and therefore not very helpful. You don't want to gas your fish, or have the co2 levels fluctuate so much.

However, you certainly can add co2 to an aquarium by fermentation. Google diy co2, or search threads on a forum like Plantedtank.net.

Before I went pressurized, I used diy co2 on my 29 gallon and my 20 gallon, and it worked quite well. I still use diy co2 on my 2.5 gallon nano tanks.
chicken is online now
Reply With Quote
Old 02-16-2013, 03:53 AM   #4
Feedback Score: 0 reviews
Join Date: Jan 2012
Posts: 63
Liked 3 Times on 2 Posts


I did the DIY co2 as well. Sugar water in a bubba keg piped and defused in. You can use co2 out of a tank the biggest thing is the injection into the water. Bubble counter is the easiest to keep track. Just remember when you turn off your lights the plants will stop taking the co2 in. So you can gas your fish at night. Proper co2 balance or turning the co2 off at night will prevent this.
CRZ is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Are these hop plants? Faub007 Recipes/Ingredients 5 09-28-2012 02:44 AM
hop plants Firebat138 Hops Growing 2 02-28-2012 09:41 PM
Hop plants kerant Recipes/Ingredients 1 01-27-2012 03:06 PM
New Plants..... 2BeerSpeer Hops Growing 17 12-09-2011 01:38 PM
My Sad Plants ChrisS68 Hops Growing 4 06-17-2008 04:04 PM

Forum Jump