Cerges' Reactor - DIY Inline CO2 Reactor - Page 48 - The Planted Tank Forum

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post #706 of 875 (permalink) Old 02-28-2014, 05:25 PM
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The trickle column design is the standard in industry in absorbing CO2 - for example from power plant emissions.



It should also work in aquaria - provided its done right. Water should pour from the top and most of the media should be exposed to CO2 - not submerged or flooded. CO2 should be bubbling from the bottom - this could be done through a dip tube. A simple counter current setup.

If anyone's interested I can post a drawing or build one for the cost of parts.
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post #707 of 875 (permalink) Old 02-28-2014, 07:01 PM
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I think the issue isn't necessarily increased absorption, it's flow. Adding the bio balls and similar may help absorption, some, but it will lower your flow.
Lowered flow is the result of increased pressure, which helps absorption so it's not necessarily a bad thing.
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post #708 of 875 (permalink) Old 02-28-2014, 07:53 PM
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Lowered flow is the result of increased pressure, which helps absorption so it's not necessarily a bad thing.
Definitely not a bad thing for co2 absorption but not necessarily a good thing for filtration, unless you have a lot of excess capacity to burn.
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post #709 of 875 (permalink) Old 02-28-2014, 10:33 PM
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Definitely not a bad thing for co2 absorption but not necessarily a good thing for filtration, unless you have a lot of excess capacity to burn.
That's why on larger tanks, the reactor should be powered by it's own powerhead, not the canister filter's.
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post #710 of 875 (permalink) Old 02-28-2014, 11:19 PM
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That's why on larger tanks, the reactor should be powered by it's own powerhead, not the canister filter's.
In theory, sure, but not everyone goes that route... and sometimes reactors are used on smaller tanks with lower flow canisters so the flow impediment is more noticeable.
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post #711 of 875 (permalink) Old 03-08-2014, 01:03 PM
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Phew! I finally finished reading this thread (took a few days in my spare time). I went out last night and got all the parts I need for this but almost everything I got was brass due the extremely limited selecti
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post #712 of 875 (permalink) Old 03-08-2014, 01:06 PM
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Fail! I can't seem to edit my post.

I was saying that there is an extremely limited selection of PVC at my local big box stores, so almost everything I bought was brass. Aside from the weight, are there any issues with this? I have brass fittings feeding water to my refrigerator for drinking, so I'm assuming it is safe for my aquarium inhabitants too. Do I need to clean / treat the brass in any way before sending water through it to my aquarium?

Many thanks!
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post #713 of 875 (permalink) Old 03-09-2014, 10:36 PM
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Fail! I can't seem to edit my post.

I was saying that there is an extremely limited selection of PVC at my local big box stores, so almost everything I bought was brass. Aside from the weight, are there any issues with this? I have brass fittings feeding water to my refrigerator for drinking, so I'm assuming it is safe for my aquarium inhabitants too. Do I need to clean / treat the brass in any way before sending water through it to my aquarium?

Many thanks!
Brass contains copper, which may be toxic to inverts such as shrimp. It is also somewhat easily corroded under acidic conditions and reacts with chlorides -although the acidity produce by CO2 is not enough to be meaningful.

The primary concern is invert and fish toxicity.If you keep doing regular water changes its fine.

You can find virtually any brass pipe fitting in plastic form (HDPE or PVC) online.
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post #714 of 875 (permalink) Old 03-10-2014, 04:32 AM
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Originally Posted by rezco View Post
The trickle column design is the standard in industry in absorbing CO2 - for example from power plant emissions.



It should also work in aquaria - provided its done right. Water should pour from the top and most of the media should be exposed to CO2 - not submerged or flooded. CO2 should be bubbling from the bottom - this could be done through a dip tube. A simple counter current setup.

If anyone's interested I can post a drawing or build one for the cost of parts.
Im a bit interested in this idea to see how it works?
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post #715 of 875 (permalink) Old 03-10-2014, 10:24 PM
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I'll keep looking for PVC components. This is what I've ended up with so far...

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post #716 of 875 (permalink) Old 03-10-2014, 10:39 PM
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I'll keep looking for PVC components. This is what I've ended up with so far...

This is nice. Id hook it up an run it for now, till u wanna change the pieces out. I was gonna do mine like this an run it to a spray bar but i kinda nervious it wount have enough pressure to run the spray bar. Anyway thats a great set up if i ever seen one.
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post #717 of 875 (permalink) Old 03-15-2014, 01:43 AM
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Red face

Well i threw one of these on my tank just to see the out come an i guess its pretty cool. Over the past month my tank started getting worse with CO2 looking like "soda" in a cup, anyway i had a couple filters for a few months now an wanted to see how it goes diffushion an rha whole nine. So far so good the only difference i dint have which a few others had was lowering of the bubble count / output, its only been a day an it took 6hrs for my drop checkers to change a little bit. Thats already telling me that my CO2 either aint high enough or im loosing some along the lines somewhere. With my regular ceramic diffuser it only takes a few hrs i should have timed this to see HRS exact but i do know that by the time of shut down drop checkers are a light lime green almost yello an they stay like that till sometime between 12am-5:30am. My co2 comes on at about 7:30-8:00am lights come on at 9:00am an off at 7:30-8:00pm lights off about 9:00pm. Well on to my thrown together set up,
Another thing i liked was the plants pearling a lot which told me they were using CO2 at the time they were supposed to. Drawback to this setup is how it fills to the top with water, i feel like its gonna start leaking one night or day an my aquarium is right abouve me n my wifes bedroom so u can see how this would be bad. Also the fact that my house will be flooded from all 70gals from my tank, im gonna tighten everything up later today with all pvc parts or better looken ones anyway.

Last edited by newbieplanter; 03-16-2014 at 01:50 PM. Reason: Added more info
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post #718 of 875 (permalink) Old 03-16-2014, 10:28 PM
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I'll keep looking for PVC components. This is what I've ended up with so far...

How much did it all cost you so I have a good estimate. :-)

My Ista Max Mix started leaking. (I haven't touched it, the attachments just decided to leak). So I have been looking into something that is of better quality.
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post #719 of 875 (permalink) Old 03-24-2014, 01:42 AM
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Brass contains copper, which may be toxic to inverts such as shrimp. It is also somewhat easily corroded under acidic conditions and reacts with chlorides -although the acidity produce by CO2 is not enough to be meaningful.

The primary concern is invert and fish toxicity.If you keep doing regular water changes its fine.

You can find virtually any brass pipe fitting in plastic form (HDPE or PVC) online.
Do u have a link to places where to get the PVC pieces/fittings?
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post #720 of 875 (permalink) Old 03-24-2014, 01:44 AM
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