Need help with CO2 misting - The Planted Tank Forum
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post #1 of 21 (permalink) Old 06-21-2008, 07:33 AM Thread Starter
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Need help with CO2 misting

The inevitable has happened. I'm no longer satisfied with my PVC reactor for CO2 induction, and want to step up to CO2 mist.

The current plan is to shoot the CO2 into the intake of a powerhead fitted with a needlewheel impeller, either purchased or DIY.

Here's where I could use some help...

What powerhead should I use? The tank is a 40 breeder, and I use an XP3 for filtration, so there is plenty of water movement already.

How do I orientate the power head and filter outlet for the best circulation?

Should I run the power head and the reactor in conjunction, or am I better off using a single method?

Thanks.
-Sean


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post #2 of 21 (permalink) Old 06-21-2008, 07:55 AM
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I like the Hagen Mini Elite underwater filter. It doesn't take up much space or move much water so you can just put your filter output next to it.

It works great at smashing the bubbles. The only problem would be if you don't want little bubbles all over your tank.

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post #3 of 21 (permalink) Old 06-21-2008, 08:05 AM
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Quote:
Originally Posted by Minsc View Post
The inevitable has happened. I'm no longer satisfied with my PVC reactor for CO2 induction, and want to step up to CO2 mist.

I'm just curious... Why are you not satisfied with the reactor?

Since I started using one, I'll never go back to anything else.

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- XP2, Dual Aquaticlife link Fixture , Pressurized CO2, DIY Reactor, EI dosing


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post #4 of 21 (permalink) Old 06-21-2008, 03:32 PM
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Tom Barr recommended the Rio 600 RVT and 800 RVT powerheads for misting: https://www.plantedtank.net/forums/ge...powerhead.html

600 RVT: http://www.marinedepot.com/ps_ViewIt...s~vendor~.html

800 RVT: http://www.marinedepot.com/ps_ViewIt...s~vendor~.html

RVT kit for 200 to 800: http://www.marinedepot.com/ps_ViewIt...s~vendor~.html

Powerhead


RVT Kit

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Last edited by Left C; 06-21-2008 at 06:55 PM. Reason: spelling error and pictures added
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post #5 of 21 (permalink) Old 06-21-2008, 05:37 PM
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I use a Maxijet 400 in my 40 breeder for misting co2. And I have an XP3 as well.

You can adjust the water flow on that one, so that is why I chose it. It takes up a little more space than I'd like, but I have some plants around it and its in the back corner, so its not totally visible.

*Kristin*
Planted tanks:40g breeder, 20g long, 29g
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post #6 of 21 (permalink) Old 06-21-2008, 05:50 PM
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I have the same question as Biscuit Slayer.

I am using the hagen underwater filter now on my 29 gallon but i just bought all the stuff to build and upgrade to an external reactor. I was under the impression that a reactor was better o.O
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post #7 of 21 (permalink) Old 06-21-2008, 06:33 PM
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What is wrong with using a canister filter for a reactor?


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post #8 of 21 (permalink) Old 06-21-2008, 06:39 PM
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Thanks for clearing it up ashappar

offtopic question: Does anyone know if you can return those plastic/brass reducing bolts and stuff that comes in plastic bags (you rip off the top first then theres a ziplock) to homedepot if you have taken the stuff out of the bag?

I bought stuff for a reactor but i may return it now...

Lescarpentier: I think some people don't use a canister as a reactor because some filters can get damaged by a build up of c02 if it doesn't get chopped up by the impeller.
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post #9 of 21 (permalink) Old 06-21-2008, 06:47 PM
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Quote:
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offtopic question: Does anyone know if you can return those plastic/brass reducing bolts and stuff that comes in plastic bags (you rip off the top first then theres a ziplock) to homedepot if you have taken the stuff out of the bag?
I'm afraid that you are stuck with it,but if you are lucky you may be able to get a store credit.

Quote:
Originally Posted by CobraGuppy View Post
Lescarpentier: I think some people don't use a canister as a reactor because some filters can get damaged by a build up of c02 if it doesn't get chopped up by the impeller.
I have heard this too,but I am interested in the particulars.Surely somebody has some experiences that they can share.


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post #10 of 21 (permalink) Old 06-21-2008, 07:25 PM
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Ah ok, thanks Les. Oh well, at least now i'll have a reactor and a mister
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post #11 of 21 (permalink) Old 06-21-2008, 08:14 PM Thread Starter
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As to why I want to switch from a reactor:
Don't get me wrong, I love my reactor and think they are wonderful for diffusing CO2 into the water. No equipment in the tank and no cleaning.

However, I have a habit of ending up with tanks full of Toninas, Erios and small leaf Rotalas, many of which can be very finicky. I already have the CO2 cranked as high as I am comfortable, and there still seems to be very little room for error.
Any time flow is reduced to any of the more difficult plants, they immediately start stunting or simply stop looking their best.

I'm not sure if CO2 misting will actually alleviate this, but I figure it is worth a try.


As for the powerheads:
Has anyone used the Rio RTVs? It looks like they are very convenient to attach the CO2 line, but I'm guessing they have the same type impeller as anything else?

JustOneMore21: Do you feel the 400 is sufficient, it is only rated for 100gph. Is that enough to compete with the flow of the Rena? Or are you just pushing the mist into the filter's flow?

Edit: Just read the link about RTVs. They do have a different impeller design from the standard powerhead.


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post #12 of 21 (permalink) Old 06-21-2008, 11:11 PM
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Quote:
Originally Posted by Minsc View Post
... As for the powerheads:
Has anyone used the Rio RTVs? It looks like they are very convenient to attach the CO2 line, but I'm guessing they have the same type impeller as anything else? ...

Edit: Just read the link about RTVs. They do have a different impeller design from the standard powerhead.
I used a 600RVT a little over a year ago. I used it by itself and it worked fine. I also hooked it up to an Eheim spray bar. It worked fine that way too. It put out a fine mist spray. I also bought some of the Rio prefilter parts for the bottom of it. I was afraid that some small fish might get sucked up. I sold it to someone that wanted to use it on a 75g aquarium. It worked fine for them too.

Here's a picture of the RVT Impeller.


Quote:
Originally Posted by ashappar View Post
I like the octopus OTP needlewheel pumps for misting.
quiet and very efficient. ...
Here's a picture of the Octopus Needle Wheel Impeller.

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post #13 of 21 (permalink) Old 06-21-2008, 11:49 PM
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I have been using a Gen-X 1000 pump with a needle wheel impeller. The impeller looks just like the one above that LeftC posted that's on the Octopus pump. I am very happy with the results it produces a super fine mist at any bubble rate.
It's fairly cheap as well about $25 + shipping.
I have mine on a 29 gallon and have a sponge on the intake to keep shrimp from getting sucked in and to slow down some of the flow, as it's pretty strong. I am planning a 75 gallon soon, and I think I'm going to go with 2 of these pumps on opposite sides of the tank. Here is a link for the pump, you may be able to find it a few dollars cheaper then here: Gen-X 1000
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post #14 of 21 (permalink) Old 06-22-2008, 12:24 AM
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Quote:
Originally Posted by Minsc View Post

JustOneMore21: Do you feel the 400 is sufficient, it is only rated for 100gph. Is that enough to compete with the flow of the Rena? Or are you just pushing the mist into the filter's flow?

I feel it is sufficient, but I haven't tried other powerheads. My powerhead is misting towards the canister outflow and the bubbles that make it to the top are pushed back down.

I'm hopefully setting up a 75g soon and may try one of the powerheads recommended in this thread.

*Kristin*
Planted tanks:40g breeder, 20g long, 29g
38g Reef tank


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post #15 of 21 (permalink) Old 06-22-2008, 12:44 AM
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Have y'all seen this U-tube OTP 3000 Needle Wheel Pump video?
http://www.youtube.com/watch?v=2hT5jiOWfv0

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