Too Much flow for Rex Rig? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 01-06-2009, 06:13 PM Thread Starter
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Too Much flow for Rex Rig?

I got a reactor from the board 2in by 14in...

Hooked up to my Fluval 404 with a rated 340 gph, and I have all the media bins full

Every time my bubble counter spit a bubble, I see bubbles come out into the tank.

I tried putting the reactor at an angle but it didn't help..

Any suggestions...

thanks
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post #2 of 11 (permalink) Old 01-06-2009, 06:37 PM
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longer reactor body maybe?

Ehfipimp #273 ( Eheim Classic: 2260, 2217, Eheim Ecco: 2236, 2232 ) Fluval FX5

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post #3 of 11 (permalink) Old 01-06-2009, 06:46 PM
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Other than a longer reactor as fsh suggested, do you have the flow coming into the top and then back out of the bottom? I often see those new to reactors having them upside down, where the flow comes into the bottom and out the top.

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post #4 of 11 (permalink) Old 01-06-2009, 08:32 PM
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I have a DIY reactor {2x15} that i run in a close loop with uv light and heater and I run a Mag 5 500gph pump. At time gas would collect and get trap on top but would go away after awhile . Your water should inter from top and exit at the bottom and IMO the co2 should enter at the bottom also so the bubbles would rise to the top against your water current and also putting in a bleeder valve on top helps out a lot and run a line too the intake of your pump or use a Aqua Medic Tee to recirculate the co2 water.
I use a Aqua Medic 1000 co2 reactor an use the bleeder valve to connect the line before my pump and i get a lot of pearling in my tank.
Check out http://www.barrreport.com/ an look up DIY CO2 Reactors
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post #5 of 11 (permalink) Old 01-06-2009, 08:38 PM
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I have significantly better performance when the CO2 enters near where the water enters at the top. This is also the standard configuration for the Rex reactor.

Out of curiosity I have tried injecting CO2 at the bottom and the flow of the water simply pushed the bubbles out.

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post #6 of 11 (permalink) Old 01-06-2009, 08:48 PM
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bubbles want to rise up.. You need a current to push down on the bubbles so they stay somewhat suspended in the water.


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post #7 of 11 (permalink) Old 01-07-2009, 05:34 PM Thread Starter
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I hate when i don't get subscribed to my own thread..



Well here is my set up

Output to Tank
rex rig
filter

With the filter on the ground going up to the reactor, then up to the tank.

The co2 line into the reactor is in the center of the reactor.


sounds like I need to reverse the flow... I don't know what I was thinking..
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post #8 of 11 (permalink) Old 01-07-2009, 07:02 PM
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Oops ... never mind!

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post #9 of 11 (permalink) Old 01-12-2009, 06:02 PM Thread Starter
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seems to be fine now...
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post #10 of 11 (permalink) Old 01-12-2009, 06:55 PM
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I made the mistake of making my reactor so the CO2 bubbles were very large, over 1/4 inch in diameter. I introduced the CO2 at the bottom. The big bubbles would shoot to the top and collect there, making the reactor less efficient than it should be. Recently I modified it to get much smaller CO2 bubbles, entering near the top. Now the bubbles hang suspended in the middle, swirling around and around. So, the size of the CO2 bubbles makes a difference, as well as where in the reactor you introduce them.

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post #11 of 11 (permalink) Old 01-12-2009, 07:40 PM Thread Starter
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hmm.. well I have no idea what the size of the bubbles inside of reactor are...

and they enter the tube in the middle
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