can fish increase CO2 Levels? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 06-28-2006, 07:16 PM Thread Starter
Planted Member
 
PTrader: (2/100%)
Join Date: Jun 2006
Location: Orange County, CA
Posts: 157
Cool can fish increase CO2 Levels?

so, i was thinking today about how i could get more CO2 in my tank w/o setting up a DIY or a cylinder CO2 setup and i thought "what if i add more fish so as they metabolize they expel more CO2 into the water?"

anyone have any thoughts on this? i know there would be an increased amount of biowaste but i wonder if it would be worth the increase CO2 levels...

lets see what you people think.
agdavis is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 06-28-2006, 07:20 PM
Planted Tank Enthusiast
 
D.gilly's Avatar
 
PTrader: (1/100%)
Join Date: Sep 2005
Location: scarborough,ontario
Posts: 705
ive wondered this many times but i believe they will to a certan extent but without madly overstocking i doubt it would help much usually nanos without a fliter tend to have more than enough co2 ? depending on how large they are but this is just my 2 cents so


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
happy fishing
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

75 gallon Tanganyika Community Planted
D.gilly is offline  
post #3 of 11 (permalink) Old 06-28-2006, 07:27 PM
Wannabe Guru
 
2wheelsx2's Avatar
 
PTrader: (1/100%)
Join Date: Jan 2006
Location: Burnaby, BC, Canada
Posts: 1,245
I think long before you will get significant increase in CO2 levels you would run into depletion of O2 problems.....

Filstar pimp #59 (shhhh on the Eheim)
2wheelsx2 is offline  
 
post #4 of 11 (permalink) Old 06-28-2006, 07:31 PM
Planted Tank Obsessed
 
SammyP's Avatar
 
PTrader: (5/100%)
Join Date: Apr 2006
Location: Westbury, NY
Posts: 316
do you need CO2 for carbon? or to lower your pH?

if you need it for carbon seachem excel does pretty well.
SammyP is offline  
post #5 of 11 (permalink) Old 06-28-2006, 10:30 PM Thread Starter
Planted Member
 
PTrader: (2/100%)
Join Date: Jun 2006
Location: Orange County, CA
Posts: 157
for carbon for the plants.... what does seachem excel do? provide dissolved CO2? is that the same as dissolved gasseous CO2 in the water?
agdavis is offline  
post #6 of 11 (permalink) Old 06-28-2006, 10:35 PM
Wannabe Guru
 
2wheelsx2's Avatar
 
PTrader: (1/100%)
Join Date: Jan 2006
Location: Burnaby, BC, Canada
Posts: 1,245
Excel does the same thing your CO2 does for the plants...provide carbon, but in a slightly different form.

Filstar pimp #59 (shhhh on the Eheim)
2wheelsx2 is offline  
post #7 of 11 (permalink) Old 06-28-2006, 10:51 PM Thread Starter
Planted Member
 
PTrader: (2/100%)
Join Date: Jun 2006
Location: Orange County, CA
Posts: 157
is it just as good at gaseous CO2? advantages/disadvatages?
agdavis is offline  
post #8 of 11 (permalink) Old 06-28-2006, 10:55 PM
Wannabe Guru
 
2wheelsx2's Avatar
 
PTrader: (1/100%)
Join Date: Jan 2006
Location: Burnaby, BC, Canada
Posts: 1,245
It supplies the same carbon that the plants need. Excel is expensive, that's the main disadvantage. A tank of CO2 might cost you $20 a year, but Excel will cost you at least 10 times that if you used only Excel in a large tank.

Filstar pimp #59 (shhhh on the Eheim)
2wheelsx2 is offline  
post #9 of 11 (permalink) Old 06-28-2006, 10:57 PM
Planted Tank Obsessed
 
PTrader: (11/100%)
Join Date: Jul 2004
Location: VA, USA
Posts: 338
Fish aren't going to produce enough CO2 to make a noticable difference... doesn't matter how many you have.
endparenthesis is offline  
post #10 of 11 (permalink) Old 06-29-2006, 09:57 AM
Planted Tank Guru
 
plantbrain's Avatar
 
PTrader: (267/100%)
Join Date: Dec 2003
Location: The swamp
Posts: 13,609
In order for the fish or anything non autotrophic to produce CO2, they need to burn carbonhydrates/ reduced sugars. To do that, they need O2. So for each O2 they use up, they produce a CO2.

There's only 6-8 ppm in most well run aquariums of O2.
So the more fish you add, the less O2.

The other bad thing with too many fish: more NH4 waste. Good filters, lots of plants can handle a fair amiount, but if you overload the system, the time it takes for the NH4 to be processed increases.............and then you get an algae bloom and the water's O2 goes down moere since now the bacteria start really using up the O2 as well.

If you take a deep gravel sample and add it to a vial and shake it good without any air inthe vial and you do not disturb the gravel sample when you take it, the O2 will quickly drop to zero(bacteria will use it all up rapidly).

You should gravel vac the substrate once every few months in sections(2-4 over 2-4 week's time) to reduce the load of bacteria snd detritus, reduced carbon laying around in a tank.

Regards,
Tom Barr




Regards,
Tom Barr
plantbrain is offline  
post #11 of 11 (permalink) Old 06-29-2006, 06:30 PM Thread Starter
Planted Member
 
PTrader: (2/100%)
Join Date: Jun 2006
Location: Orange County, CA
Posts: 157
Quote:
Originally Posted by plantbrain
In order for the fish or anything non autotrophic to produce CO2, they need to burn carbonhydrates/ reduced sugars. To do that, they need O2. So for each O2 they use up, they produce a CO2.

There's only 6-8 ppm in most well run aquariums of O2.
So the more fish you add, the less O2.

The other bad thing with too many fish: more NH4 waste. Good filters, lots of plants can handle a fair amiount, but if you overload the system, the time it takes for the NH4 to be processed increases.............and then you get an algae bloom and the water's O2 goes down moere since now the bacteria start really using up the O2 as well.

If you take a deep gravel sample and add it to a vial and shake it good without any air inthe vial and you do not disturb the gravel sample when you take it, the O2 will quickly drop to zero(bacteria will use it all up rapidly).

You should gravel vac the substrate once every few months in sections(2-4 over 2-4 week's time) to reduce the load of bacteria snd detritus, reduced carbon laying around in a tank.

Regards,
Tom Barr
good to know! thanks a ton.
agdavis is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome