Cerges reactor question - The Planted Tank Forum
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post #1 of 24 (permalink) Old 10-25-2012, 12:49 PM Thread Starter
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Cerges reactor question

I've been using my newly built cerges reactor for a few weeks now and I'm still wondering:
A) Why is my drop checker only reaching green/blue when I'm running a lot of bubbles per second? It's pretty much a constant stream of bubbles.
B) Why does it take so many more BPS than a normal diffuser or Rex Grigg reactor even?
I realize that with a diffuser the bubbles are filling the water column and getting into the bell causing the drop checker to get a higher reading faster. And that a drop checker is only a very rough estimate of CO2 levels, but it's all I got. What is the better situation for growth, a yellow/green drop checker with 3 BPS from a diffuser or a blue/green drop checker with 7-8 BPS from a cerges reactor?
I really like the cerges reactor because of the no bubble look and having less equipment in the tank, but I'm starting to wonder if I am using the best method.

http://www.plantedtank.net/forums/sh...49#post4205849

40B, T5HO, Turface, pressurized co2,EI dosing
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post #2 of 24 (permalink) Old 10-25-2012, 10:17 PM
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Did you try tilting the reactor a little like 20 degrees or so? Then the output flow from your canister/pump will blast into the gas pocket that collects at the top.

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post #3 of 24 (permalink) Old 10-26-2012, 12:03 AM
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Unless you have a leak somewhere, the Cerges is more efficient. Especially if you do not see any micro bubbles out of you outflow pipe. If you don't see micro bubbles you are getting 100 percent dissolution of CO2.

You're drop checker was probably giving you false readings with your old diffuser pushing CO2 into bubbles into it.

Double check for leaks, Then watch your plants for increased growth.
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post #4 of 24 (permalink) Old 10-26-2012, 05:46 AM
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Tank size,type filter used and what size house filter did you set-up ? I use a 20" x 4.5" house filter with a Eheim 2262 filter for my 110g tank and it works great . I fill my reactor with mini bio balls to break up co2 and the flow and I get 100% diffusion.
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post #5 of 24 (permalink) Old 10-26-2012, 10:39 PM Thread Starter
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I've tried tilting the reactor and there's no change. I don't hear any gurgling from it like if there was a gas pocket.

I'm not getting any micro bubbles from the output. I sprayed soapy water on all the connections...no leaks.

It's a 40 breeder, Aquatop 500 filter, I used the normal normal size filter housing not the 20" and I put a coarse sponge in the bottom. Like I said no bubbles escaping the reactor.

This is really frustrating be cause the bubble counter is pretty much a constant stream of bubbles and I've put new 4dkh in the checker and still getting the same reading. Unfortunately I can't judge anything by plant growth as of right now as this is a new setup.

http://www.plantedtank.net/forums/sh...49#post4205849

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post #6 of 24 (permalink) Old 10-27-2012, 12:32 AM
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Is your tanks ph dropping? I get a ph drop of 1 point when my drop checker shows green/yellowgreen. Maybe you have too much surface agitation? Your situation is interesting..


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post #7 of 24 (permalink) Old 10-27-2012, 12:41 AM
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Whats the working pressure of your reg set at? I had to send a stream of bubbles into my reactor when i had it at like 10psi. Ive since bumped it up to 18psi and about 4 or 5 bps and this is on a 125.


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post #8 of 24 (permalink) Old 10-27-2012, 02:56 AM
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Is this the type of filter you are using?

If so, these can deplete the CO2 in the tank water very quickly unless you eliminate all splashing.

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post #9 of 24 (permalink) Old 10-27-2012, 02:29 PM Thread Starter
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I'll have to check my ph. Haven't done it in a while. It used to be that in the morning it would be at 6.8-6.9 and during the course of the day drop to about 6.4-6.5. I have quite a bit of flow but its not breaking the surface. A rolling boil is how I'd describe it.

My reg is still set to 30 psi. I never reduced it from when I had the diffuser on. Bad on my part. I'll have to lower it later.

The filter is the canister version of the aquatop. CF500 I think it is.

http://www.plantedtank.net/forums/sh...49#post4205849

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post #10 of 24 (permalink) Old 10-28-2012, 04:21 PM
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You sure your 4dKH is accurate?

Do you have fish/shrimp in the tank?

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post #11 of 24 (permalink) Old 10-28-2012, 09:52 PM Thread Starter
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It's always been acurate. Not even a year old. Does it go bad often?

Only some oto cats in there right now.

http://www.plantedtank.net/forums/sh...49#post4205849

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post #12 of 24 (permalink) Old 10-28-2012, 10:36 PM
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I've had 4dKH and Bromo Blue being bad {old shelf life or out-dated}
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post #13 of 24 (permalink) Old 10-29-2012, 01:48 AM
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Your pressure *should* be OK.

Maybe your setup is too new. Your plants have not acclimated to the new environment and are not putting out new growth.

Your CO2 injection setup suggests that you are putting enough CO2 into the tank water.

Maybe wait a little longer to change things until your plants are settled. I would say bump up the co2, but you are already running a decent level. 30PSI@ 6BPS in a 40g?

Can you cut back your surface agitation to see if your drop checker changes to green?

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post #14 of 24 (permalink) Old 10-29-2012, 02:10 AM
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Def eliminate surface agitation. That has to be it if theres no leak. Makes no sense. Hope we can help get to the bottom of this.
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post #15 of 24 (permalink) Old 10-29-2012, 05:53 PM Thread Starter
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Doing a test of my drop checker fluid. I put the diffuser back in to see if the fluid will get into the yellow green area.

http://www.plantedtank.net/forums/sh...49#post4205849

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