Rex Grigg style reactor not working - Page 2 - The Planted Tank Forum

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post #16 of 46 (permalink) Old 09-14-2012, 10:37 AM
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Quote:
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therein lies your problem. the input should be on the top, output on the bottom.
Not neccessarily. Bubbles rise if the return is at the bottom what bubbles are making it through have to go all the way to the surface to be realesed. Gives more time to dissolve.

Again its about flow in the tank and how much u put through. A needle valve wide open at 5psi doesnt let nearly as much co2 through as a needlve valve halfwayway open at 10 psi

Also check ur dc solution and make sure its 4dkh. If its anything higher its hard to get out of blue
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post #17 of 46 (permalink) Old 09-14-2012, 05:37 PM
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If I could post video here I could show all the co2 bubbles in my tank. Drop Checker is still dark blue. If I change the water flow in my reactor, what difference would I notice?
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post #18 of 46 (permalink) Old 09-14-2012, 05:50 PM
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If I could post video here I could show all the co2 bubbles in my tank. Drop Checker is still dark blue. If I change the water flow in my reactor, what difference would I notice?
check the drop checker and make sure its 4dkh
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post #19 of 46 (permalink) Old 09-14-2012, 06:08 PM
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I bought this from GLA and it doesn't state anywhere whether it is a 4 or 5 dKH that is supplied.
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post #20 of 46 (permalink) Old 09-14-2012, 07:02 PM
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if u bought their fluid its 4 dkh unless they made a bad batch. do u have a kh test kit?
what ph reagent did u use?

and beyond this having the right flow through a reactor, and also through ur tank makes a big difference. if the co2 isn't geting mixed with the tank u'll never change the drop checker
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post #21 of 46 (permalink) Old 09-14-2012, 07:06 PM
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Supposedly the dKH they sell already has the ph included so nothing needs to be added. I have not done any water testing at all, so I will do that later.
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post #22 of 46 (permalink) Old 09-14-2012, 08:16 PM
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oh. well that's new. mine came clear i had to add my own
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post #23 of 46 (permalink) Old 09-14-2012, 08:28 PM
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Nope mine was blue right out of the bottle
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post #24 of 46 (permalink) Old 09-14-2012, 10:01 PM
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well u can always put the co2 tub into the DC just to make sure it can turn color first
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post #25 of 46 (permalink) Old 09-14-2012, 10:49 PM
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If there is no leak, what bubble counter do you use?
The JBJ type push out bigger bubbles, one bubble equals several on that the ADA inline type.
The reason for this, is a bubble double in diameter, the volumn is 8 times of that the half size bubble(in diameter).
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post #26 of 46 (permalink) Old 09-14-2012, 11:07 PM
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I use the bubble counter that came with my Aquatech regulator. It is kind of small and I have really stopped using it as a reference point. I'm hoping the drop checker will work. I might just move it to the side of the take where the return is and see if that makes a difference. Wouldn't think so since the DC is covered in co2 bubbles.
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post #27 of 46 (permalink) Old 09-14-2012, 11:23 PM
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Well if the dc is working then u just arent injecting enough.. it doesnt matter which side its on unless flow through the tank is really poor
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post #28 of 46 (permalink) Old 09-14-2012, 11:26 PM
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Quote:
Originally Posted by milesm View Post
therein lies your problem. the input should be on the top, output on the bottom.
To take the a step further. The flow should be moving downwardly through the reactor. The air bubbles want to rise to the top. As the water flows down the turbulent friction pulls the bubbles down. The counter flow of bubbles wanting to rise but being dragged down causes them to dissolve.
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post #29 of 46 (permalink) Old 09-15-2012, 02:15 AM
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I'm going to reverse the flow tomorrow and see what happens. No harm in it.
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post #30 of 46 (permalink) Old 09-15-2012, 02:36 AM
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Well I turned the co2 up a bit this morning and it did take all day.....but it finally went green. So no need to change the flow in reactor.
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