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  Topic Review (Newest First)
11-24-2008 01:50 AM
Wasserpest Welcome to the Planted Tank, and congrats on resurrecting a 3 year old thread

Feeding CO2 bubbles into the HOB filter should be a bit more efficient than the airstone method. I have been bubbling CO2 into a AquaClear HOB for many years to enrich my 10gal tank.
11-23-2008 07:36 PM
desjardo I've been told it will spike less if you let it be overnight. I am currently just using an airstone as I havent decided on another method and have $0 in my budget. I am considering the hose in the bottom of my HOB. NOt sure how effective it would be.
11-22-2005 04:43 AM
willie guys i am new to this DIY co2 system, may i know how long it takes for it to react (start producing co2 bubbles)?????

and how do u mix the sugar with the yeast?? ratio??? also the water, how much should i put???

11-03-2005 10:05 PM
D.gilly ive been told to turn off my co2 at night , what do all of you do with that?
09-21-2005 10:11 PM
FobbyBobby Co2 always helps
but you may need to upgrade your lighting, depends on the kinds of plants

i dont think the fry would have any problem with the addition of Co2, as long as you dont overdo it and create some huge pH fluctuations or anything
09-21-2005 09:00 PM
Using CO2 with Koi

My 10gal tank currently houses Koi fry, It has a small amount of plants but they are looking bad. Could CO2 help? Will it hurt the fry (they are usually more sensitive than adults. What's a simple way to check the CO2.
09-17-2005 02:53 PM
Not Mister Green
thanks for the tip sarahbobarah...

its super to hear about these great ideas before starting to buy equipment - I'm going with the test tube stoppers.

BTW, has anyone used fermenting jugs of wine as a DIY CO2 source? I'm definetly going to need to install a gas separator.
09-17-2005 02:38 PM
sarahbobarah I use test tube stoppers with predrilled holes. No muss, no fuss, no turning, and completely leak proof.
09-17-2005 02:01 PM
Not Mister Green
most excellent article rabbit....

the article states:

"Carbon dioxide rich groundwater often feeds the streams and natural CO2 concentrations up to several hundred times atmospheric equilibrium are common"


"At low light and low CO2 there is not much energy to play around with for up or down-regulation of the pools of Chlorophyll or enzymes contained in the plant. If we then add a little more CO2 to the system the plant can afford to invest less energy and resources in CO2 uptake and that leaves more energy for optimizing the light utilization - Chlorophyll can be produced without fatal consequences for the energy. Hence, although we have not raised the light, the plant can now utilize the available light more efficiently. Exactly the same explanation can be used to explain why increased light can stimulate growth even at very low CO2 concentrations. With more light available, less investment in the light utilization system is necessary and the free energy can be invested into a more efficient CO2 uptake system so that the CO2, which is present in the water, can be more efficiently extracted"


Anywhose, no doubt this info is old hat to many on this site but for newbies like me this article is a must read!

I'm getting lined out for a DIY C02 with gallon jugs of wine and Mr. LeVasseur's superb article answered many of my questions.

Thanks for sharing!
12-27-2003 11:27 PM
Rabbit If I may,

brilliant layout (although perhaps a tad more high tech than I personally go).
11-20-2003 02:11 PM
malkore I used a short piece of the narrowest rigid tubing I could get, to run through the bottle caps. This way you can slide the airline onto it (a tight fit) and if you need to replace the airline due to damage, or needing a longer/shorter length, it's easy.

also, a poor man's airtight seal can be made with fun tack (that blue/yellow sticky stuff for posters)...and its' reusable and not permanent.
11-19-2003 02:51 PM
Pockafwye This is the first time I've seen someone online address the issue of the goop that accumulates from the CO2. Thank you for your ideas on how to deal with this.

I've used DIY CO2 for a couple of years, and have almost given it up a couple of times due to the icky goop accumulating in my filter.

11-01-2003 06:30 AM
Originally Posted by aeternum23
Could you guys perhaps post pics of your setups?
Sorry, I have no pics, if I had a digicam I'd post nothing but snaps of all my purty tetras anyway, be warned <56K Xmas is coming. :lol:

Re imploding juice bottles are more structurally sound than pop - just leave some juice out a day or so to discover their sealing efficiency.

I have a 2-litre pop bottle with a 500 ml bottle strapped to the side of it with duct tape. The big bottle has the yeast mixture maybe 75% full, the smaller bottle has dechlorinated water maybe 75% full also. I drilled a 3/16" hole in the big bottlecap and two in the smaller bottlecap, cut the ends of the tubing on a bias to make them easier to pull through with needlenose pliers. Airline tubing maybe 8" long goes from just inside the cap on the big bottle to well down in the small bottle (instant bubble counter), another tube cut to required length and from just inside the 2nd hole on the small bottle is the output. On my little tank I have a similar deal with 2 500 ml bottles. Out of the yeast gas, into the water, out of the cleaned of yeast-gook gas into the tank, capiche?

On both tanks the output goes to an upside-down 500 ml pop bottle with the top cut off and a hole drilled near the top to accommodate the incoming CO2 hose, an airstone holds the tubing in place. If there is too much CO2 going in the setup the little bottles in the tank will *burp* that gas lost of course but ergo harmless - drawback to having no regulator of course. For my big tank I hope to construct a reactor similar to the one Buck describes in the DIY section this weekend. I had the output going to a little Aquaclear but took it off as was unconvinced of its' effectiveness per previous . . .

total kudos to depthc for starting this thread, tho - most excellent instrux, dude!

hope this helps from a greenhorn aquatic greenthumb, just fumbling along meself, one epiphany at a time . . .
10-31-2003 09:21 PM
aeternum23 Hehe, thanks again Wasser
10-31-2003 09:11 PM
Wasserpest As described in the other post... if the airline is positioned to closely to the impeller of the pump or in the area where water is sucked into the inlet, it might pull the CO2 out of your bottle, collapsing ("imploding"?) it and drawing the yummie mixture into the tank. Not good.
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