CO2 Reactor for 340 gallon? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 12-31-2011, 03:04 AM Thread Starter
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Question CO2 Reactor for 340 gallon?

I have a red sea system and it seems the reactor is not up to snuff. I would like to put the CO2 in the sump (I started a thread on the equipment category) and plumb it into the return. I was thinking about getting approximately 15" of 2" or 3" PVC and stuffing it with bioballs. Does this make sense? Is it worth spending the extra $ on clear PVC? How do you attach the CO2 tubing, top or bottom? Thanks in advance.
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post #2 of 8 (permalink) Old 12-31-2011, 04:13 AM
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I don't think one of those reactors is going to be adequate for a 340 gallon tank. It won't handle enough CO2 to do the job. Something like a needlewheel pump, or a Mazzei venturi would be much more likely to work well. Or, if you are willing to use only low light, you don't need as much CO2, so you might be able to make the reactor, or a couple of them, work out.

Hoppy
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post #3 of 8 (permalink) Old 12-31-2011, 05:58 AM
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Hoppy, what is the benefit of using a ventury to inject the CO2 over just using a straight pipe?

Always curious.
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post #4 of 8 (permalink) Old 12-31-2011, 04:42 PM
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A venturi will atomize the CO2 as the bubbles enter the throat of the venturi. They get sheared off by the very fast flow through the throat, leaving very tiny bubbles in the water. Mazzei venturis need lots of head pressure to drive the water through them, and they are high flow devices, ideal for very large tanks. A needlewheel pump does the same thing, with one less device, and much easier to set up properly. Both of these will very likely cause lots of microbubbles of CO2 to float around in the tank water, so it that is annoying to you they aren't a good idea.

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post #5 of 8 (permalink) Old 12-31-2011, 06:48 PM Thread Starter
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Hoppy, I just looked at the V584 Mazzai Venturi injector and wondered if that would work for my situation? I have a basement sump with a Mag 18 and about 9-10 feet of head. The return is T-d at the pump into (2) 3/4" lines headed up to the tank. Each return has a ball valve. Do I have too much/too little flow? To respond to your previous question, I have just about 2 watts per gallon and may add a little more. The injector was only about $60, I would struggle to build a reactor out of clear PVC for that amount.
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post #6 of 8 (permalink) Old 12-31-2011, 07:37 PM
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Unfortunately, 2 watts per gallon could be extremely high ligh, or it could be too little light, or anything in between. What are the tank dimensions and what exact lights are you using?

I am not qualified to tell you what Mazzei venturi to use, or what pump or pumps will work well with it. You could PM Plantbrain if you want some very good advice on the whole subject.

Hoppy
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post #7 of 8 (permalink) Old 12-31-2011, 08:21 PM Thread Starter
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Thanks.The tank is 96x30x27 tall. The lights are 6700k compact fluorescent. I'm new to the forum. How would I pm Plantbrain?
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post #8 of 8 (permalink) Old 01-01-2012, 03:54 AM
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I have a 340 Gallon tank using a similar CO2 reactor that works fine. I input at the bottom, and use a clear pipe. While every situation is not the same, for the price, what have you got to lose. No question however, Hoppy and Plantbrain are the experts
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