Reactor for 190gal - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 04-21-2011, 11:38 AM Thread Starter
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Reactor for 190gal

So I wanted to build a reactor for my 190gal, I now inject CO2 connected to a needle wheel and the 7up look just doesn't appeal to me.

I wanted to build a rex grig reactor but I was wondering what length I should make it, does it need to be longer for a bigger tank?

I will be using it with a eheim pro 3e 2078 (1850lph)
Thanks
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post #2 of 12 (permalink) Old 04-21-2011, 11:46 AM
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What fits under your tank?


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...DIY co2 sucks
...ricca sucks
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post #3 of 12 (permalink) Old 04-22-2011, 05:41 AM
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A Aqua Medic is 3x15 , I be-live . I would go with ether
3-4 inch DIA x 15-24 inch High. Or try this

https://www.plantedtank.net/forums/di...2-reactor.html

I saw in Lowes a clear housing home filter with 1 inch in-put / out-put that could be use . If you don't want to drill the filter you can add the co2 before
it goes into the filter.
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post #4 of 12 (permalink) Old 04-22-2011, 10:04 AM Thread Starter
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I like the idea of directly plugging it into the input of the filter though I don't want to risk affecting my BB. The reactor will be placed beside the tank, as I can't fit it underneath.
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post #5 of 12 (permalink) Old 04-22-2011, 10:29 AM
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I've got a 2078. If you read the manual you'll see that the 1850 number is for zero head and an empty canister. With full media your down around 1100 with nothing inline and the pump maxed out.

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post #6 of 12 (permalink) Old 04-22-2011, 12:15 PM Thread Starter
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So would putting a reactor on the return flow reduce this even further?
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post #7 of 12 (permalink) Old 04-22-2011, 01:37 PM
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I did some extensive testing and found that a Hydor ETH300 reduced the flow by 7% and a RG reduced it an additional 5%. I've since made some slight mods to my RG and plumbing which may have improved the reactor addition a bit but I think you'd have to assume at least a 10% hit from the pair. I didn't test the reactor separately.

Note that the default pump speed setting for the Eheim is 60% of max.

So 1850 empty, 1100 full, 900-1000 with heater and RG, ~600 at factory default.

You can read details of my testing on my blog.

Jim


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post #8 of 12 (permalink) Old 04-22-2011, 05:06 PM Thread Starter
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Cool will do, thanks.

I found an old external I have rated at 600lph. It's some cheap Chinese filter so I'm not too bothered about using it as filtration. Would I get the same results if I just plugged CO2 directly into the intake of this external rather then building a reactor?
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post #9 of 12 (permalink) Old 04-22-2011, 05:07 PM Thread Starter
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....

Last edited by NeocaridinaCollector; 04-22-2011 at 05:09 PM. Reason: Double post
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post #10 of 12 (permalink) Old 04-23-2011, 04:46 AM Thread Starter
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Bump
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post #11 of 12 (permalink) Old 04-23-2011, 08:31 AM
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Yes but supposedly the CO2 will make the water more acidic and ruin the propeller and whatnot down the road. Other than that and you dont mind the electricity, then sure.

Just DIY a reactor. Your Eheim pro pump is powerful enough to push through, might be too too powerful even. Fill it up w/ bio-ball to trap the bubbles. Make it streamline, straight w/ no elbows, if you're particular about flow. Help a lil bit.
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post #12 of 12 (permalink) Old 04-23-2011, 11:40 AM
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Rex Reactor will work also if you use 2" pipe just make it longer you can fit it in the back side of ur fish tank, or make one of 3" instead of 2".. Might work and cheap also.

Life is Like Bed of Rose's... Full of Thorns and Bugs...
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