DIY CO2 for a 90 gallon??
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > DIY


Reply
 
Thread Tools Display Modes
Old 12-13-2013, 07:48 AM   #1
fred1163
Algae Grower
 
fred1163's Avatar
 
PTrader: (2/100%)
Join Date: Jan 2013
Location: Racine, WI
Posts: 53
Default

DIY CO2 for a 90 gallon??


Since I cannot afford to buy a pressurized CO2 system for my planted 90 gallon, I thought I might try the DIY method.

I don't think the conventional 2L coke bottle method would work to get enough volume of gas into a tank this size..

But, I do have one of these 5 gallon glass water bottles...


I'd need a rubber stopper
of some sort...

and some airline tubing...


some of this...


a little of that...
"><img src=" /> ">

I have a couple of these lying around...

Will DIY CO2 work on a larger scale??


Looks like I'll need some check valves, needle valve, and bubble counter...

Have any of you tried DIY CO2 on any larger volume tanks?
fred1163 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-13-2013, 08:50 AM   #2
Darkblade48
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 9,077
Default

Yes, it could work on a larger scale, though it would be extremely time consuming and messy, in my opinion.

Also, a glass bottle is not the best idea, because if pressure builds up, it is possible that it will explode, sending glass shards everywhere.

You will also probably find out that costs will become prohibitive in the long run.
__________________
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   Reply With Quote
Old 12-13-2013, 11:23 AM   #3
Toby_kourtney
Algae Grower
 
PTrader: (1/100%)
Join Date: Jun 2013
Location: Minot,ND
Posts: 145
Default

Quote:
Originally Posted by fred1163 View Post
Since I cannot afford to buy a pressurized CO2 system for my planted 90 gallon, I thought I might try the DIY method.

I don't think the conventional 2L coke bottle method would work to get enough volume of gas into a tank this size..

But, I do have one of these 5 gallon glass water bottles...


I'd need a rubber stopper
of some sort...

and some airline tubing...


some of this...


a little of that...


I have a couple of these lying around...

Will DIY CO2 work on a larger scale??


Looks like I'll need some check valves, needle valve, and bubble counter...

Have any of you tried DIY CO2 on any larger volume tanks?
I originally had DIY co2 on my 75 gallon and it worked but was a lot of upkeep. I used 3-1 gallon Gatorade bottles and changed one out every week. It was miserable and the cost of sugar adds up. It can work it's just a lot of work.
Toby_kourtney is offline   Reply With Quote
Old 12-13-2013, 10:55 PM   #4
Lornek8
Planted Tank Enthusiast
 
PTrader: (1/100%)
Join Date: Jul 2013
Location: Kaneohe, Hawaii
Posts: 531
Default

You could get away with that setup, the problem is consistency, cost and hassle of mixing. I ran a 2x2L bottle setup on a 55gallon and had to change bottles at least every 2 weeks. If you take the standard mix (2cups sugar per 2L bottle), it equates to roughly 1 pound of sugar per bottle per batch. Scale this up for a 5gallon bottle (app 20L) and you get about 10 pounds of sugar every 2 weeks per bottle. In bulk I get sugar from Costco for app $0.40-0.50 per pound (quite likely less in your area) but that's about $4-5 in sugar every 2 weeks per bottle. If you were to invest in even a paintball setup, you'd end up changing canisters fairly often but then it costs $3.50 per 20-24oz bottle at my local Sports Authority. Even if I had to refill every couple of weeks it be less than what it cost for sugar and the level of co2 would be more consistent.
Lornek8 is online now   Reply With Quote
Old 12-13-2013, 10:58 PM   #5
xmas_one
Planted Tank Guru
 
PTrader: (17/100%)
Join Date: Feb 2010
Location: Long Beach, CA
Posts: 3,245
Default

DIY isn't worth the hassle/fluctuations in my book. Set up a tank for no co2 or go whole hog and get a regulator and a bottle. Consistency is key.
xmas_one is offline   Reply With Quote
Old 12-13-2013, 11:31 PM   #6
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,639
Default

If you decide to try those glass bottles, don't use the needle valve. It is only barely possible to get too much CO2 for that size aquarium, so you would be best to just leave the CO2 line open, running as high a bubble count as you can get. I suspect you will run into BBA problems with DIY CO2 because of the difficulty in keeping the CO2 level the same every day. DIY CO2 typically doesn't give a constant bubble rate, but a slowly decreasing bubble rate followed by a more rapidly decreasing bubble rate. It may be interesting for you to try this, but very soon you will decide you just have to go with pressurized CO2.
__________________
Hoppy
Hoppy is offline   Reply With Quote
Old 12-14-2013, 06:23 PM   #7
fred1163
Algae Grower
 
fred1163's Avatar
 
PTrader: (2/100%)
Join Date: Jan 2013
Location: Racine, WI
Posts: 53
Default

I thought that much sugar/yeast would keep producing gas for a lot longer than 2 weeks.

I don't think I would want to have to buy all that sugar and stuff every couple of weeks, let alone the mess of trying to get the old exhausted mix out of the 2" opening at the top of the bottle.

Oh well...thanks all for the input.

I guess I'll just keep dosing Excel until I can afford a real Co2 system.
fred1163 is offline   Reply With Quote
Old 12-14-2013, 08:02 PM   #8
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,639
Default

What lighting do you have on that tank? If it is low light, you will probably see an improvement with even a single 2L DIY CO2 bottle, and that might encourage you to give up dinners for a month so you can afford a pressurized system. Think of how slender you would be too!
__________________
Hoppy
Hoppy is offline   Reply With Quote
Old 12-15-2013, 02:33 AM   #9
herns
Planted Tank Guru
 
herns's Avatar
 
PTrader: (228/100%)
Join Date: May 2008
Location: Los Angeles
Posts: 2,921
Default

Quote:
Originally Posted by xmas_one View Post
DIY isn't worth the hassle/fluctuations in my book. Set up a tank for no co2 or go whole hog and get a regulator and a bottle. Consistency is key.
+1.

I have a 2 gal with diy 2 bottles, 2L soda bottles under finnex med led light fixture and honestly I hate the fluctuations even for this very small tank.
herns is online now   Reply With Quote
Old 12-15-2013, 03:28 AM   #10
scapegoat
Planted Tank Guru
 
scapegoat's Avatar
 
PTrader: (14/100%)
Join Date: Jun 2010
Location: philadelphia, pa
Posts: 2,151
Default

Quote:
Originally Posted by Darkblade48 View Post
Also, a glass bottle is not the best idea, because if pressure builds up, it is possible that it will explode, sending glass shards everywhere.
Tell that to the thousands of homebrewers that use glass carboys for fermentation. There is more pressure at the bottom of an aquarium than in a glass carboy with a rubber stopper meant for allowing gas to escape.
__________________
scapegoat is offline   Reply With Quote
Old 12-15-2013, 06:08 AM   #11
Darkblade48
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 9,077
Default

Quote:
Originally Posted by scapegoat View Post
Tell that to the thousands of homebrewers that use glass carboys for fermentation. There is more pressure at the bottom of an aquarium than in a glass carboy with a rubber stopper meant for allowing gas to escape.
It's all fine when there is still a method for gas to escape, but in the event that (say) your airstone gets clogged by the mouldy gunk that is inevitable with DIY CO2, you might run into some problems.
__________________
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   Reply With Quote
Old 12-15-2013, 11:54 AM   #12
scapegoat
Planted Tank Guru
 
scapegoat's Avatar
 
PTrader: (14/100%)
Join Date: Jun 2010
Location: philadelphia, pa
Posts: 2,151
Default

Quote:
Originally Posted by Darkblade48 View Post
It's all fine when there is still a method for gas to escape, but in the event that (say) your airstone gets clogged by the mouldy gunk that is inevitable with DIY CO2, you might run into some problems.
That 2l plastic bottle is going to blow well before the glass. I'd think the airstone would pop off the plastic air line before the carboy blew apart sending glass shrapnel everywhere.
__________________
scapegoat is offline   Reply With Quote
Old 12-15-2013, 07:34 PM   #13
herns
Planted Tank Guru
 
herns's Avatar
 
PTrader: (228/100%)
Join Date: May 2008
Location: Los Angeles
Posts: 2,921
Default

Quote:
Originally Posted by Darkblade48 View Post
your airstone gets clogged by the mouldy gunk that is inevitable with DIY CO2..
This one thing I hate, too. Every week I have to clean the nano glass diffuser in my 2G.

Iam thinking of switching pressurized next year for my 2g.
I have my other tanks having press. but, I thought a small tank will do on diy.
Well, they work but its just a lot of work and fluctuations is one thing I dont really like.

Last edited by herns; 12-15-2013 at 07:35 PM.. Reason: spelling.
herns is online now   Reply With Quote
Old 12-15-2013, 11:56 PM   #14
Darkblade48
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 9,077
Default

Quote:
Originally Posted by scapegoat View Post
That 2l plastic bottle is going to blow well before the glass. I'd think the airstone would pop off the plastic air line before the carboy blew apart sending glass shrapnel everywhere.
What 2L bottle? Toby_kourtney only was thinking of using a glass bottle, from what I can tell (unless you meant to put in an additional 2L gas separator?)

In any case, I prefer to take the "better safe than sorry" route. I'm sure using glass is fine in most cases, but I personally would not do so.
__________________
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   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT. The time now is 01:26 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012