DIY CO2 Bubbles

I disagree; Using a HOB to diffuse C02 works far better than an actual ceramic diffuser.
With a HOB, it disperses C02 more effectively throughout the water column as the impeller munches up the bubbles.
Using a diffuser, bubbles go up and pop in the atmosphere.

A reactor is the best solution, although it takes a fairly small one with DIY.

I personally have one diffuser on a 29 gal and one reactor on an 80gal . The remaining seven planted tanks use a HOB as a diffuser.

Idk FTM, i tried looking at the inside of my AC filter once the bubbles go to the impeller and you can see once they reach the impeller area they are chopped up by it but then escape through the hole which is right by the impeller.
 
I have an XP2 on my 46G BF. I run the CO2 line into the top of a 20G HOB. I know at least some of the CO2 is staying in the water column. My tapwater's PH is 7.0 and the day after a WC the tanks PH has dropped to 6.6. and the plants are thriving:

http://gs69.photobucket.com/groups/i60/7NOBMDJJ0N/

The only problem I see is the spitting noise created when a burst of CO2 enters the HOB.

Charles
 
I have an XP2 on my 46G BF. I run the CO2 line into the top of a 20G HOB. I know at least some of the CO2 is staying in the water column. My tapwater's PH is 7.0 and the day after a WC the tanks PH has dropped to 6.6. and the plants are thriving:

http://gs69.photobucket.com/groups/i60/7NOBMDJJ0N/

The only problem I see is the spitting noise created when a burst of CO2 enters the HOB.

Charles

7.0 to 6.6 isn't great.

You have the XP2 on the 46G and the HOB on a 20G, or both XP2 and HOB(made for a 20G) on the 46g? Just trying to understand.

As I read it, you have both filters on the 46g, and if that's the case, you should try running the co2 directly into the cannister filter(not the HOB) and see what kind of a pH drop you get. You'll be very happy.
 
Yes the 46 has both an XP2 and a HOB . I'm hesiiant to get too much of a PH swing.
And where would I inject the CO2?? In the screw off cap that's used for priming??

Yhsnk you,
Chsrles
 
pH drop of .4 isn't very much co2. It depends on KH of course, but it's still not enough/as much as you could get.

I run a tube directly into the intake of my cannister filter:

302625839.jpg



That picture is from when I was running DIY CO2. I'm now pressurized, but I still inject the same way. Works great, near 100% diffusion.

Also, why both the HOB and XP2? If it were me I'd ditch the HOB, go with just the XP2 with the co2 injecting into it. You'll really minimize surface agitation that way and see an terrific increase in co2 levels(using DIY CO2, not too high, but just high enough) and a boost in plant health/growth.
 
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