"Valve" for diy co2 - The Planted Tank Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 01-09-2013, 05:31 AM Thread Starter
Algae Grower
 
Adamson's Avatar
 
Join Date: Mar 2012
Location: St. Cloud, MN
Posts: 49
"Valve" for diy co2

I was wondering, what exactly would the effect be if I put on a cheap little plastic "valve" thing on the airline for my diy co2.

It would be this:


Basically I could either have it be completely shut, or partially shut overnight so my co2 levels don't get too crazy overnight.
I woke up to a dead fish last week which surprised me, as the tank is 58 gallons and the co2 is only going at about 1 bps.
Maybe it was the ph swing that did it.
Adamson is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 01-09-2013, 05:38 AM
Planted Tank Enthusiast
 
Join Date: Apr 2012
Location: Edmonton, Canada
Posts: 818
Close the valve at night and get woken up with an exploding yeast bottle. How many bottles are you running?

I don't think it was the CO2 that killed your fish. DIY on a tank that size would be really hard to gas fish. I think...
creekbottom is offline  
post #3 of 16 (permalink) Old 01-09-2013, 05:38 AM
Plant Clown
 
kevmo911's Avatar
 
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 4,568
It wasn't the pH swing, nor was it the CO2 levels. Unless you have 6 or more 2L bottles of standard-mixture DIY CO2 going. And, even in that case, while it might have been a result of too much CO2, it definitely wasn't the result of a pH swing.

As to the original question, installing a valve will most likely cause the tubing to blow off of something.

Look for another cause of the fish death, and your concern for overnight CO2 levels is unwarranted.
kevmo911 is online now  
post #4 of 16 (permalink) Old 01-09-2013, 05:59 AM Thread Starter
Algae Grower
 
Adamson's Avatar
 
Join Date: Mar 2012
Location: St. Cloud, MN
Posts: 49
I am running 2 2l bottles on it. I didn't think it was the co2 but I haven't lost a fish due to an unknown cause in a year, so it was kind of strange for me. Also it was my first time having my ph below ~7.6 ever. So I am not sure.

But sounds good, I won't use the valve, no need to anyway. Thanks for the quick responses!
Adamson is offline  
post #5 of 16 (permalink) Old 01-09-2013, 06:16 AM
Algae Grower
 
funkman262's Avatar
 
Join Date: Nov 2010
Location: Tampa, Florida
Posts: 124
Quote:
Originally Posted by creekbottom View Post
Close the valve at night and get woken up with an exploding yeast bottle.
You beat me to it. If you want to prevent pH swings overnight, run an airstone at lights-off to strip the excess CO2 out of the water. You may especially want to consider doing that if your fish are gasping at the surface when the lights turn on.
funkman262 is offline  
post #6 of 16 (permalink) Old 01-09-2013, 09:02 AM
Planted Tank Enthusiast
 
Join Date: Mar 2010
Location: Queens, NY
Posts: 817
Chemical reactions in an essentially sealed soda bottles will lead to disaster. The CO2 has to escape somewhere.
Bluek24a4 is offline  
post #7 of 16 (permalink) Old 01-21-2013, 06:12 AM
Algae Grower
 
Join Date: Jan 2013
Location: out wandering around
Posts: 78
Could you put that valve inline on a tee? Just open up the valve and let the co2 out into the room at night and close it in the morning. As long as there is some pressure from the diffuser it shouldn't make it into the tank.
discgo is offline  
post #8 of 16 (permalink) Old 01-21-2013, 07:01 AM
Algae Grower
 
Join Date: Jul 2007
Location: Nashville, TN
Posts: 118
Exploding soda bottles are not to be messed around with. I would not recommend this even with a T outlet or whatever, because if you screw it up blowing a soda bottle is legitimately dangerous (hearing damage).
Zolek is offline  
post #9 of 16 (permalink) Old 01-21-2013, 07:05 AM
Algae Grower
 
Join Date: Jan 2013
Location: out wandering around
Posts: 78
Quote:
Originally Posted by Zolek View Post
Exploding soda bottles are not to be messed around with. I would not recommend this even with a T outlet or whatever, because if you screw it up blowing a soda bottle is legitimately dangerous (hearing damage).
Why? If the valve were closed co2 would go onto the tank like normal. If it were left open, no pressure would build and co2 would be released into the room.
discgo is offline  
post #10 of 16 (permalink) Old 01-21-2013, 07:12 AM
Planted Tank Enthusiast
 
Join Date: Mar 2010
Location: Queens, NY
Posts: 817
And all the water from your tank would drain out if you didn't use a check valve. I would also think its unsafe to be in a room that has CO2 just being released into it while your sleeping.
Bluek24a4 is offline  
post #11 of 16 (permalink) Old 01-21-2013, 07:23 AM
Algae Grower
 
Join Date: Jan 2013
Location: out wandering around
Posts: 78
Quote:
Originally Posted by Bluek24a4 View Post
And all the water from your tank would drain out if you didn't use a check valve. I would also think its unsafe to be in a room that has CO2 just being released into it while your sleeping.
I didn't realize diy co2 put off that much volume.
discgo is offline  
post #12 of 16 (permalink) Old 01-21-2013, 07:32 AM
Planted Tank Enthusiast
 
Join Date: Mar 2010
Location: Queens, NY
Posts: 817
It probably doesn't, but I still wouldn't be into that.
Bluek24a4 is offline  
post #13 of 16 (permalink) Old 01-21-2013, 07:39 AM
Algae Grower
 
ronnie6989's Avatar
 
Join Date: Jan 2013
Location: East Prov RI
Posts: 80
That valve u can not back pressure for one and also after time the co2 most likely eat up the valve and rot after time.

Ronnie
ronnie6989 is offline  
post #14 of 16 (permalink) Old 01-21-2013, 08:17 AM
Planted Tank Enthusiast
 
Join Date: Apr 2012
Location: Edmonton, Canada
Posts: 818
If you let the gas out into the room, you will lose any pressure built up in the bottle. In the morning the bottle will have to re-pressurize in order to force the gas back into the tank. Also, there is a distinct possibility of getting oxygen in the bottle if it's open to the room. I'm not completely sure about this but, you would be making your yeast swing between anaerobic and aerobic fermentation. DIY CO2 is already an inefficient system, doing this just makes it completely pointless, in my opinion.
creekbottom is offline  
post #15 of 16 (permalink) Old 01-21-2013, 03:06 PM
Wannabe Guru
 
mrkookm's Avatar
 
Join Date: Apr 2007
Location: Delaware
Posts: 1,600
2 DIY Co2 bottles on a 58gal tank is not gonna cause a problem on that size tank . I had 1 2L on a 10gal a while back with fish with no issues.




The Junkie
mrkookm 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