DIY Diffusor? I need more CO2

ErrorS

AC Members
Dec 29, 2006
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Indiana
I'm going to buy a pressurized tank but it will after I get back from vacation.

In the meantime, has anyone built a decent diffusor and would you be willing to tell me what you did?

I can't do a reactor.. I tried running one in-line with my 2126 and there were far too many design problems, it just didn't work. I don't like them now.. and you couldn't pay me to use one, regardless of how efficient they are.

I read somewhere where a person used a small, acrylic tube, stuck an airstone in it and drilled holes. It looks cool but the stupid CO2 doesnt seem to be disolving, it just comes out of the top holes and floats to the surface once it gets to a certain point.

I've tried misting with a powerhead but I don't think that did the job.

Normally my CO2 reads great (using PH and KH) but I don't trust the readings anymore. I was working on the reactor today and had my filter unplugged, after about 30 minutes every single one of my plants started shooting out oxygen bubbles faster than my airpump could. I couldn't believe it.. this is after a 24hour missed dose of Excel.

With all the work I've put into the tank my plants rarely do that.. but that's when I found out that the way I was injecting CO2 just wasn't good enough.

I get 5+ bubbles a second with my DIY..

I'm sick of equipment, in the end it seems to hurt my plants more than help. The powerhead took up a big section of the tank and turned it into a shaded 'no grow' area. The inline reactor made it almost impossible to clean my filters (my landlord is going to kill me, you should see my floor). I use to drill a hole in a tupperware container and have my filter outtake go into that, no thanks.. I don't want anything like that.

Noone here sells the Hagan ladder and i'll be out of town by the time someone can ship it.. but a similer design, is it possible DIY with the kind of junk someone may have laying around?

does anyone think my 2126 can handle 5+ bubbles per second from DIY CO2 if I ran the airstone into the filter intake? I worry because it's a heated canister, if air gets trapped I could ruin my filter.
 
I made myself a little bubble ladder. This is what I modeled mine out of. I used an empty blister-pack and some hot glue to make it. Other than the hot glue not sticking to the suction cup (getting some silicon tomorrow, it just came off today), it's worked fine for about a week. By worked I mean it holds the Co2 in the water much longer than before.
 
I run mine through the intake with no airstone. By the time it reaches the tank there are no bubbles. I am not using 5 bubbles per second and you might have to reduce that. It is very effecient. I don,t think you will have a problem with the heater because so much water goes throught the filter that it doesn't allow time for air to accumulate. If it does, it would be apparent by by the bubbles being returned to the tank. Through the intake is an amazingly efficient way of dissolving CO2 without adding a diffuser.
 
Going to your profile and filling in your location helps us help you.

I use DIY external PVC reactors on all my tanks. They work like a champ.

The mistake many people make is putting them on the inlet side of the reactor instead of the outlet side.

If you go to my Guide there is a pictorial on how I build my reactors.
 
I use an inline reactor on my 55. But in my 10, I use a simple glass diffuser. Works pretty well. I placed it under the intake of the filter so there is more CO2 contact time with the water. Cheap, easy, and does the trick.
 
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