Cerges Reactor - new idea? - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 04-19-2015, 12:38 AM Thread Starter
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Cerges Reactor - new idea?

Have read many threads on building various types of reactors for use in injecting cO2 into the water column. The cerges seems to be popular but the one thing is seem to keep running across is the loss of flow thru the reactor. With that thought in mind, I cam up with the following idea. Using a 450 gph power head, I cant seem to notice any real reduction on flow between with reactor and without.

Now, here is my big question for those of you that have built and used these.
In the second pic, do you think cO2 gas will build up in the cap (top) of the reactor? If so, is that a big deal if it does? I suspect once the bubble gets big enough it will just get pushed out one of the 2 outlets.

Also, fyi - the cO2 line will be installed on the inlet, just below the hose connection. Also, once installed the bottom of the reactor will be at the same level as the bottom of the canister filter.





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post #2 of 10 (permalink) Old 04-19-2015, 03:58 AM
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I'm confused.

I have not seen a filter canister like that before, with two outlets on the sides of the cap and an inlet on the top in the middle of the cap. The ones I have seen have an inlet and outlet on opposite sides of the cap with nothing on the top.

Did you plumb both the inlet and the outlet on the sides of cap together and then drill a hole in the center of the cap for the pipe that goes to the bottom of the canister?

My understanding of the cerges reactor is the water flows in and immediately enters at the top of canister where the co2 is collecting. It is constantly churned by the inflow and is absorbed by the water. The water then flows down to the bottom of the canister and then into the end of the pipe where it then flows back up [through the pipe] and out of the canister through the outlet. Because the water is exiting the canister though the pipe at the bottom, the co2 bubbles can not escape. Any bubble that are pushed down towards the bottom by the current of the water simple float back up to collect at the top where the water is entering.
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post #3 of 10 (permalink) Old 04-19-2015, 05:35 AM
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uh yeah these canister filters with no filters in them do not create any appreciable restriction in flow.. which I am sure you would of noticed if you just did it the same way everyone else does.

infact most people have to bypass it to reduce flow and make restrict the output more, without damaging there pumps.. because too much flow and the bubbles dont dwell in the chamber and get blown right through.. it wont collect at the top, it will go right into your tank.

ive seen not a single person complain flow was too low, infact the opposite.. seems less flow is better on a cerges... you've over engineered in reverse and likely created a giant leak.. reducing the output pressure will only hurt the operation of it, as higher exit pressure dissolves co2 faster.


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post #4 of 10 (permalink) Old 04-19-2015, 11:51 PM Thread Starter
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Thanks for the info guys - moved on to a different design


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post #5 of 10 (permalink) Old 04-20-2015, 12:40 AM
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cerges

A cerges is the way to go. I don't understand why you built it this way, and why you have so many elbows on it. Here is a pic of mine . very simple and very affective. I have a disani water bottle on the inside with the bottom cut out. The water and co2 feeds into the top of the bottle. The large size of the bottle allows the co2 to stay in the bottle and to disolve better. My filter housing has a shutoff/bypass valve built in.


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Last edited by rick dale; 05-07-2015 at 12:24 AM.
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post #6 of 10 (permalink) Old 04-20-2015, 01:15 AM Thread Starter
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Hey Rick, your water bottle idea is a good idea. Regarding all the elbows, my setup includes a bypass loop so I can maintain full filter flow. The bypass valve is used to adjust how much water goes thru the reactor.


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post #7 of 10 (permalink) Old 04-20-2015, 11:42 AM
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Oh , understand now. Nice build.


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post #8 of 10 (permalink) Old 04-20-2015, 11:56 AM
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Nice build Immortal. I guess you have a strong filter.


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post #9 of 10 (permalink) Old 04-20-2015, 10:20 PM Thread Starter
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Thanks for the compliments. Filter is a Marineland C-360. As promised, here is an installed pic. Due to limited space, I designed the reactor in more of a vertical fashion so I could squeeze it behind the filter (need to leave room for cO2 bottle)


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post #10 of 10 (permalink) Old 04-21-2015, 02:42 AM
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i love this because we can never have enough space inside the cabinet


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