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  Topic Review (Newest First)
02-22-2003 08:12 PM
anonapersona It may be that you will need more CO2 than the Hagen can deliver due to the size of the tank. Depending on your filtration (surface disturbance) and your water, you could get a good response though. I think that you need to get the Hagen system running and see what effect it has when it is going correctly.

Your particular water chemistry is very important. If you have not tested for starting pH and KH, do so now. Go buy a test kit if you don't have one. This is critical to know before you start messing with the water chemistry. Lots of good info here, spend some time reading.

The Hagen diffuser works great unless you send too many bubbles in at one time. The Hagen system mix is amazingly regular in the bubble production, no doubles, ever. Even a single DIY yeast bottle using the diffuser, alone, without combining with the Hagen bottle, might send out two bubbles at the same time which are so large that they race through the diffuser, and one bubble is pretty much wasted. I am currently doing that in the 20 gallon tank, and it is only a problem when the bubble rate is pretty low. So, two bottles are workable, if you decide that this is necessary. But, make an educated decision, don't just jump in and do this.

Really, you will just have to experiment. Start with what you have, get it working correctly, test and see if the results are adequate. If not, try adding a second bottle to feed into the diffuser. If that is still not enough, you may need a different input method to be able to use more DIY bottles, like a power reactor of some sort.
02-22-2003 02:52 PM
corey do you think I need the two bottles and the hagen system?
02-22-2003 03:02 AM
anonapersona The Hagen system really does work well but it is limited to smaller tanks. For a while I was running the Hagen system with an additional bottle set up so that the bubble rose into the bottom of the Hagen diffuser. That worked pretty well actually, once I got the hose set up just right.

No the canister is just too small to work any faster. I tried adding extra sugar and it slowed it down a lot. I didn't try adding extra yeast, but it ought to multiply up to whatever working population the bottle can hold fast enough anyhow.

What is your water, pH and KH in the tank before CO2?

Two 2 liter bottles might be good for that size tank, I use a 2 liter on my 20 gallon tank with a Hagen diffuser and on my 29 gallon tank but with a DIY vortex-style reactor. I still have a Hagen running on the 10 gallon, and I am trying to duplicate the yeast and stabilizer ingredients. Still don't know what the stuff is in the stabilizer, but it is mostly baking soda.
02-22-2003 01:15 AM
corey sorry cant smell anything I dont know I'm stumped. Wish I had found out about this DIY system before I bought this thing. Is it possible for me to add yeast to the canister?
02-22-2003 01:08 AM
bobjiggason you still have a leak you should get a buble every second. At least thats what i get from my DIY yeast CO2. Check the seals and see if you can smell CO2 leaking from the container. if you can theres a leak
02-22-2003 12:53 AM
corey great thanks I checked the yeast and it was working (awfull smell) so I changed the tubing and in less then a hour I have bubbles very slow around 1 every min but they are started. With the hagen plant gro if I have 3 of them would that be better?? And does anybody know if I can set them all into the one diffuser?
02-22-2003 12:16 AM
Rex Grigg You have a leak. Or you used water that was too hot and it killed the yeast. Open up the bottle and see if the yeast is working, you should also be able to smell it. If the yeast is alive then you have a leak. Tighten the lid and check the tubing for nicks and cuts. You should know that the Hagen unit is really for smaller tanks, under 20 gallons. It's not going to help you a lot with a 55 gallon tank. As far as lights, do you have the standard 2 bulb top on your 55? If so get a glass canopy and use a couple of shop lights. Or if those offend your sense of order go to and get a 2X55 watt upgrade kit.
02-21-2003 08:36 PM
corey Hello I found this site in search of advice about my newly planted 55g tank. I have had this tank for 3 years but have always kept Oscers. I was due for a change so I have removed my oscers and I am going to try plants. I have a few Amazon swords and a few hydrophilla plants not sure exactly what kind. I bought the hagen unit (I'm also going to make the DYI co2 system) I set the hagen up 2 days ago and I havent seen a bubble yet!!!!!!!!! SOMEONE HELP!!!!!!!!! Also any advice on ferts would help also. Like how offen. Lights are another topic. How many watts and what kind of bulb. I know this is a little much but thanks for you help.................Great site and I look forward in meeting everyone.

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