Cerges' Reactor - DIY Inline CO2 Reactor - Page 49
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Old 04-12-2014, 09:48 PM   #721
kevinmichael77
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So would I need a powerhead of I decided to use one of these or can I just run it off my eheim 2217 canister filter? My tank is a 33 gal, right now I'm just using a atomizer but the tank gets a lot of co2 bubbles.

Thanks!
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Old 04-12-2014, 10:20 PM   #722
newbieplanter
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Quote:
Originally Posted by kevinmichael77 View Post
So would I need a powerhead of I decided to use one of these or can I just run it off my eheim 2217 canister filter? My tank is a 33 gal, right now I'm just using a atomizer but the tank gets a lot of co2 bubbles.

Thanks!
I got mine running on a cheap eheim knock off with a spray bar an its fine, that was my main concern too about a powerhead lol.
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Old 04-12-2014, 10:26 PM   #723
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Did it inhibit the flow at all? Only thing is I'm not handy at all so not sure I can put it together properly


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Old 04-12-2014, 10:28 PM   #724
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Quote:
Originally Posted by kevinmichael77 View Post
Did it inhibit the flow at all? Only thing is I'm not handy at all so not sure I can put it together properly


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Not that i can tell, as far as assembly its real easy. Do u have parts already?

Last edited by newbieplanter; 04-12-2014 at 10:31 PM.. Reason: Added
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Old 04-13-2014, 02:37 AM   #725
kevinmichael77
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No parts yet. Still wasn't sure if it's worth it or if I could build it.
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Old 04-16-2014, 01:04 PM   #726
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If I really don't have the time to build my own reactor, and if I did the water filter housing I was looking at is almost $90 as I wanted the large 20" one, would I just be better off to go with CarbonDoser EXT5000 (External Reactor 5000)? It going to run on 180 gallon system with 75 gallon sump, will also be setup using it own pump.

Thanks
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Old 04-18-2014, 07:21 AM   #727
rezco
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Default CO2 reactor -packed column

Quote:
Originally Posted by newbieplanter View Post
Im a bit interested in this idea to see how it works?
Well it took a while but here is the plan:


The concept is similar to my build of a large scale bubble column prototype. In that design I discovered that an internal venturi is highly effective at dissolving Co2 into the water. With this packed column we can get the highest efficiency in a small package. The principle of efficiency is simply due to surface area - the media forms a huge surface area for gas-liquid contact. Excess CO2 is collected in the top of the tower and is recycled by the venturi. When CO2 is consumed the water level rises and more gas is allowed to be injected. In case of confusion I would like to clarify this is not a pressurized setup.

Here's how it works:

CO2 is injected through a T junction in the incoming water. An internal venturi/nozzle sprays water over a packed bed. The ideal packing is pond filter media pictured below. This allows a thin film of water to flow down and contact the CO2 gas over a large surface area. A layer of water on the bottom allows any entrained bubbles to float up, and clear water exits to the tank.

A side mounted water level float switch is crucial to the design. These can be picked up on a Ebay for around $10. This switch is triggered when the water level rises and energizes the CO2 relay allowing more gas to flow in. The gas pressure keeps the water level down and prevents the packed column from getting flooded.if the column is flooded then the gas-liquid surface area is reduced. That's why packing media in a conventional Cerges or Rex Griggs is usually of no benefit.

The column should be around 4"dia and 12-18"in length for 200-400 gallon tanks. Flow rate can be very slow (about 100 gpm) so you only need to divert part of the flow from a canister and not compromise the performance of your filtration system. Smaller designs can be made for smaller tanks (ie. a 3" x 12" reactor for a 100 gal tank)

Gas flow rate for my bubble column setup is about 2-3 bps for a 200 gal set up so I think that this should be similar or better in terms of CO2 consumption.

Since this reactor is self regulating there is no need for a bubble counter and a precision valve and regulator. This saves a lot of $$$ and headache in fine tuning your CO2 system. A lower cost single stage regulator will do fine. The amount of CO2 delivered to the tank will actually depend on the flow rate of water through the reactor. The faster the flow the more CO2 will be dissolved out and flow to the tank.

Construction:
Made from 4" PVC pipe, I would use clear PVC on the center section, the caps can be white PVC. For easy cleaning I would suggest using 4"dia threaded PVC fittings. Float switch can are be installed with a small hole drilled on side and an O ring+ silicone sealant. Some valves come with bulkhead fittings that provide a better seal. Total parts are about $75.

Packing media:


If anyone is interested in building one please let me know and I can help you get the parts together.
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Old Yesterday, 10:07 AM   #728
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Quote:
Originally Posted by kevinmichael77 View Post
No parts yet. Still wasn't sure if it's worth it or if I could build it.
I promise its worth it, i was in the same position your at now but when i had the chance to start buyin parts i gotem then it sat for awhile after that too in my fish room. Now that its hooked an runnin after the first few days of being scared to come home to a very big flood LOL im so glad i hooked it up. Serious!
Im always the first one whos like that thing is worth less but now i see after spending $50+ on all different methods i just wish i got this sooner $50 aint much but anyway i'll tell u this an noone else will, i personaly will buy yoyr set from u if it u dont get 100% diffusion in ya tank! Now thats a good deal i think?
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Old Yesterday, 04:11 PM   #729
kevinmichael77
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Cool I appreciate the advice. After thinking about it I just don't know where I would put it. There's not much room on my outflow with the inline heater. Not sure where I'd put it.


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Old Yesterday, 04:34 PM   #730
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Quote:
Originally Posted by kevinmichael77 View Post
Cool I appreciate the advice. After thinking about it I just don't know where I would put it. There's not much room on my outflow with the inline heater. Not sure where I'd put it.


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Got a pic of ya set up? (Filter)
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Old Yesterday, 04:44 PM   #731
kevinmichael77
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Here ya go.


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Old Yesterday, 07:40 PM   #732
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Originally Posted by kevinmichael77 View Post


Here ya go.


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Im thinkin u can tuck it behind the CO2 bottle.
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