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CO2 dispersal

Aaandyyy

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15 Jun 2016
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Wiltshire
Most of my tanks tend to be larger units 600-1000 litres so CO2 dispersal is usually a reactor or multiple units.
Just setting up a 10x3x3 approc 2000 litres to allow for some emersed growth so ideally want something other than 4 or 5 reactors.
Suggestions please.
 

Aaandyyy

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15 Jun 2016
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Wiltshire
One large reactor powered by a needle wheel pump would also work.
perhaps a marine specialist will have a suitable vessel and a needle wheel pump.
Ok thank you this could work. Cergis type reactor or do they restrict the flow? Any particular pumps you would recommend to look out for? Have room for either a 10 or 20" chamber so presumably the bigger would be better as I dislike the microbubbles.
 

Aaandyyy

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If it was my tank I would be thinking more along the lines of a much bigger reactor not something that would fit under the tank.
Ok but please could you expand on this? I don't need to put it under the tank. Tell me what you would recommend and then if it is something that is not feasible for my situation at least we would then have a starting point to discuss a possible solution. Thank you.
 

foxfish

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11 Oct 2009
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Ok well I dont think you will find a purpose built C02 reactor that can deal with 2000 l.
So working on the basis of scaleing up what is available you will be looking and at least a 30” tall reactor.
Of course the design will define the dimensions but in a simple form ... size matters and the longer the contact time inside the vessel while mixing with the water the more likely the C02 will dissolve .
I think it would be possible to make a more compact design that had an internal vortex if your are prepared to DIY your own but these things can take a lot of experimenting and setting up.
There is a link in my signature with a video that shows how I made a compact reactor to suit my 200l tank.
Maybe two 30” x 6” tubes of a similar design would be sufficient?
 

Michael1212

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18 May 2019
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Singapore
My untested instinct is that rate of co2 dissolution should be proportional to contact time multiplied by contact area (as well as other things). With an inline diffuser or needle wheel pump to mist co2 before it enters a reactor, the surface area of the co2 grows exponentially. I use this strategy on my 800L tank.
 

Aaandyyy

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My untested instinct is that rate of co2 dissolution should be proportional to contact time multiplied by contact area (as well as other things). With an inline diffuser or needle wheel pump to mist co2 before it enters a reactor, the surface area of the co2 grows exponentially. I use this strategy on my 800L tank.
Thank you. Would you mind sharing what you have on your 800l to see if feasible to upscale it?
 

Michael1212

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18 May 2019
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76
Location
Singapore
Thank you. Would you mind sharing what you have on your 800l to see if feasible to upscale it?
Take a look here: My 200g window . Even though I'm using 2x30cm tall reactors here, I over engineered it and I think one would be fine. Throughout the day I'm getting a 1.4 ph drop, and the reactors are not filling up with gas so there is plenty of room to move.
 

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