DIY CO2 for a 75 gallon tank - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 05-31-2010, 05:38 AM Thread Starter
Algae Grower
 
pufferfish's Avatar
 
Join Date: Aug 2009
Location: Orangeburg. NY
Posts: 22
DIY CO2 for a 75 gallon tank

So I want to build a DIY CO2 system for a 75 gallon I've started up and really have no idea what I'm doing. I was thinking about using three 2 liter bottles and attaching one tube to all three using T-connector. Then just run the tube into the tank and let it go. What are the check valves used for? I guess I hook the end into an air stone however I've never used air stones and know nothing about them or what type to use. Am I on the right track? or am I missing something completely? Any help given would be greatly appreciated.
pufferfish is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 05-31-2010, 05:58 AM
Algae Grower
 
Join Date: Jul 2008
Location: King of Prussia, PA (philly burb)
Posts: 137
Even three 2l bottles of DIY (non pressurized) may not add alot co2 to a tank that size. What kind of filtrations on the tank.

Co2 needs to have alot of contact time to be absorbed into the water. Running the tube into a canister filter or powerhead would increase the co2 saturation into the water.

Check valve stop the tank water from possibly flowing back into the bottles.
izzy2 is offline  
post #3 of 10 (permalink) Old 05-31-2010, 06:14 AM Thread Starter
Algae Grower
 
pufferfish's Avatar
 
Join Date: Aug 2009
Location: Orangeburg. NY
Posts: 22
I think its an Eheim 2236. That's another thing I don't understand. Do you really drill a hole into the tube coming out of your filter. That kinda sounds like a mess and I'm not really sure where to drill the hole or how to attach the tube. I've never used a powerhead either I looking into them now. Any type that would be good for this type of thing?
pufferfish is offline  
post #4 of 10 (permalink) Old 05-31-2010, 06:55 AM
Planted Tank Guru
 
OverStocked's Avatar
 
Join Date: May 2007
Location: SoDak
Posts: 10,732
DIY co2 is a waste on a 75g tank. You will have next to no impact... The inconsistencies will just cause more problems
OverStocked is offline  
post #5 of 10 (permalink) Old 05-31-2010, 01:15 PM
Moderator
 
Darkblade48's Avatar
 
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,444
Quote:
Originally Posted by over_stocked View Post
DIY co2 is a waste on a 75g tank. You will have next to no impact... The inconsistencies will just cause more problems
+1.

Save yourself the grief and aggravation of having to change bottles endlessly and go with pressurized.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  
post #6 of 10 (permalink) Old 05-31-2010, 03:29 PM
Wannabe Guru
 
jmhart's Avatar
 
Join Date: Mar 2008
Location: Atlanta,GA
Posts: 1,674
You can do DIY CO2 on a 75g, people have done it on bigger tanks, but it's a real PITA. 3 2L bottles won't do it. I used 3 2L on my 45g. You'll need many bottles and multiple points of injection, as well as really good water circulation.

CO2 is beneficial at any level, but the problem comes in when people think they have a good level of co2 and start adding ferts and upping their lighting. If you're tank is low light and currently not having any algae issues, then the addition of whatever CO2 you can get from DIY CO2 will be beneficial.

But, if you're hoping to be able to move from low light to high light(or even increase your lighting at all) with DIY CO2 on a 75g, I advise against it. You'll have nothing but headache and problems.
jmhart is offline  
post #7 of 10 (permalink) Old 05-31-2010, 03:54 PM Thread Starter
Algae Grower
 
pufferfish's Avatar
 
Join Date: Aug 2009
Location: Orangeburg. NY
Posts: 22
You all make a good argument. I should have started smaller. I guess I could spare at most another $200 on CO2. Does anyone know a good web site that I can piece one together? Also maybe a good reference to learn about pressurized systems so I can figure out what I need now and what I can add later?
pufferfish is offline  
post #8 of 10 (permalink) Old 05-31-2010, 04:51 PM
Planted Tank Guru
 
Hoppy's Avatar
 
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 20,928
http://www.plantedtank.net/forums/di...-info-lot.html should be interesting to you. It is the best post here, in my opinion, about how to assemble a CO2 regulator system.

Hoppy
Hoppy is offline  
post #9 of 10 (permalink) Old 05-31-2010, 08:18 PM
Moderator
 
Darkblade48's Avatar
 
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,444
For additional information regarding how to set up your own pressurized CO2 system, check out the primer that I wrote (it is linked in my signature).

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  
post #10 of 10 (permalink) Old 06-01-2010, 12:41 AM Thread Starter
Algae Grower
 
pufferfish's Avatar
 
Join Date: Aug 2009
Location: Orangeburg. NY
Posts: 22
Thank you all this information has helped a lot. I now understand how this process works. Now all I have to do is figure out which parts to use and how to but them cheaply.
pufferfish is offline  
Reply

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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