How to replicate Hagen Elite Mini filter Co2 diffuser mod? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 05-05-2015, 04:40 AM Thread Starter
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How to replicate Hagen Elite Mini filter Co2 diffuser mod?

So my LFS says hagen doesn't make that model of filter anymore. Before running my tubing through my HOB filter intake for diffusing co2, is there any other filter that can do the same job as the hagan elite mini? I heard co2 diffuses almost 100% with that method.
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post #2 of 6 (permalink) Old 05-05-2015, 05:39 PM
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That little Hagen filter is just a tiny powerhead with an attached small filter chamber on the inlet side. The mod puts the CO2 tube in that filter chamber, so it goes through the powerhead and gets chopped up. Any small in-tank filter can be modified that way and will work as well or better. I used one https://www.plantedtank.net/forums/sh...10&postcount=2 and found it worked best if I used a tiny airstone on the end of the CO2 line, so a stream of tiny bubble went through the powerhead instead of a few big bubbles.

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post #3 of 6 (permalink) Old 05-05-2015, 09:32 PM
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That filter works poorly. A dedicated powerhead works far better creating smaller bubbles. Diffusion is never 100% with this method.
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post #4 of 6 (permalink) Old 05-06-2015, 03:57 AM
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Quote:
Originally Posted by Solcielo lawrencia View Post
That filter works poorly. A dedicated powerhead works far better creating smaller bubbles. Diffusion is never 100% with this method.
It is a dedicated powerhead, but one with a chamber around the inlet to the powerhead. It works great with a diffuser on the end of the CO2 line, so the tiny bubbles get chopped up in the powerhead.

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post #5 of 6 (permalink) Old 05-06-2015, 04:08 AM
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Quote:
Originally Posted by Codzilla View Post
So my LFS says hagen doesn't make that model of filter anymore. Before running my tubing through my HOB filter intake for diffusing co2, is there any other filter that can do the same job as the hagan elite mini? I heard co2 diffuses almost 100% with that method.
Hi Codzilla,

Your LFS people lied...http://www.amazon.com/Elite-Underwater-Mini-Filter-Listed/dp/B0009YD7D4. I use one for my 75 gallon and it works great.

75 gallon; CO2 injected with Hagen Elite Mini Internal Filter

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75 Gallon, 2X55W AH Supply CF 8800K, 1X 59W Fluval Plant (3.0); 45 Gallon Tall, 1X 46W Fluval Plant (3.0); 30 Gallon Long; Fluval F&P 2.0; 20 Gallon, 1X26W AH Supply LED; all with CO2 & (Calcined) Montmorillonite Clay
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post #6 of 6 (permalink) Old 05-06-2015, 06:57 AM
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Quote:
Originally Posted by Hoppy View Post
It is a dedicated powerhead, but one with a chamber around the inlet to the powerhead. It works great with a diffuser on the end of the CO2 line, so the tiny bubbles get chopped up in the powerhead.
I have two of them and neither work well for this purpose. They used excessive amounts of gas due to poor dissolution. Ceramic diffuser underneath didn't work any better. The impeller is very weak and is very loud when the bubble hits the impeller. Also, the impeller is imbalanced and makes noise as it rattles. A dedicated powerhead works much better and chops up the gas into smaller bubbles, as well as providing stronger current which can circulate the gas around the tank better. A powerhead is also much quieter when the gas hits the impeller.
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