CO2 reactor and GPH - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 05-13-2019, 12:45 AM Thread Starter
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CO2 reactor and GPH

Hello,

Looking into setting up a new tank, it will be fairly small around 20 gallons or 18 after soil etc (23.5-24" long 15" high and 14 1/4" wide).

I am going to run co2 inline and don't want micro bubbles in the main tank so want to run a reactor. Trying to keep the setup super clean with everything in the cabinet.

I was going to run a Eheim professional 4+ 250 so I will be getting over the 10 x turnover but if I also add the reactor into the return line of this filter will I lose a lot of gph?

I have about 50 gph extra but maybe I need to get the 350 gph model to run the reactor and then use ball valves if the flow is too much.

Don't want to have a power head in the tank.

What are your thoughts.

Thanks
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post #2 of 6 (permalink) Old 05-14-2019, 07:08 PM
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depending on the length of your reactor, you may have to restrict flow to it or you'll get bubbles in your tank. split the output: one to the reactor and another one with a lily pipe or some such. personally, i'd go with the higher flow filter. on my 20h (which is slightly taller and not as wide as your tank) i have about 200gph going through my closed loop reactor and eheim 2213 for additional circulation/filtration.
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post #3 of 6 (permalink) Old 05-16-2019, 12:41 PM Thread Starter
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Thanks, sounds like a good idea to split off the reactor. I will go with the higher gph filter for sure then.
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post #4 of 6 (permalink) Old 05-17-2019, 09:51 PM
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Quote:
Originally Posted by BeastlyFern View Post
Thanks, sounds like a good idea to split off the reactor. I will go with the higher gph filter for sure then.
i would split the filter output before the reactor, that way you can adjust how much you can push through it without spitting bubbles back into the tank.
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post #5 of 6 (permalink) Old 05-18-2019, 01:37 AM Thread Starter
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Originally Posted by milesm View Post
i would split the filter output before the reactor, that way you can adjust how much you can push through it without spitting bubbles back into the tank.
Ok so right after the canister out I would put a Y connection and have one to the tank output and one to the reactor. Then have the reactor out side T back into the return line going into the tank. I assume that I would put a ball valve on either the reactor side or return side right after the Y slitter to create so back pressure forcing water more one way than the other.

Is this what you mean? I assume that I should put the ball valve on the reactor side. Also should I use the same size tubing for the reactor side of the split or shrink it?

Thanks for you help
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post #6 of 6 (permalink) Old 05-18-2019, 08:08 PM
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yes put a Y or a T on the filter output. put a ball valve on the line going to the reactor. use this to control how much you want to push through the reactor. (you could put another valve on the reactor output, it will help if you have to remove the reactor for cleaning). the other line you can just output to the tank for more circulation. to make things easier just use same size tubing all the around.


filter output--->T/Y--->ball valve->reactor->ball valve--->tank
other arm of T/Y--->tank
so you would have two outputs on the tank, one from reactor and the other from filter. i guess you could do a recirculating loop to get one output, but i wouldn't know how to plumb it. anyway, i don't think you want a single output blasting 400gph even with a lily tube. my reactor's output is in the front upper left corner and my filter output is in the back upper right corner creating a counter clockwise current.

if you are using 1/2" id vinyl tubing HD has nice valves in their sprinkler section. not sure but they may have larger sizes.

Last edited by milesm; 05-18-2019 at 08:30 PM. Reason: add more
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