Power head reccomendations/placement for a 15 gallon aquarium - The Planted Tank Forum
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post #1 of 9 (permalink) Old 06-30-2016, 04:31 AM Thread Starter
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Power head reccomendations/placement for a 15 gallon aquarium

Hello everyone! I have a question on how to adequately circulate carbon dioxide in my 15 gallon aquarium. I am using pressurized carbon dioxide with an in-line carbon dioxide diffuser on the return Lily pipe. My issue is is that there are two dead spots in the circulation; one in the back left of my tank behind my plants and the other directly underneath my movie pipes. I also noticed that the Lily pipes I get an accumulation of diatoms.


I would like your recommendations on some small powerheads such as the hydor pico, tunze, or sicce syncra nano to bolster the flow and to keep the carbon dioxide adequately circulating in my tank for the plants. I would also like to ask for your recommendation on proper placement of it to ensure that I'm getting the best possible flow.
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post #2 of 9 (permalink) Old 06-30-2016, 05:12 AM
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Hi JuanSan,

For my 30 gallon I run a Marineland C-220 canister filter and a(discontinued) Micro-Jet MC450 (450 lph / 117 gph) and my tank has more than enough flow. When using a powerhead I recommend finding one that has adjustable output.

Roy
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post #3 of 9 (permalink) Old 06-30-2016, 02:15 PM
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Can you put the output of the CO2 near the input of the filter?
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post #4 of 9 (permalink) Old 06-30-2016, 07:35 PM Thread Starter
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I will end up doing both of these great ideas ill move the inlet closer to the return to reduce stagnant points between them and then put a powerhead on the left well to propel the water more behing the rocks. Thank you!
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post #5 of 9 (permalink) Old 06-30-2016, 09:18 PM
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Quote:
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I will end up doing both of these great ideas ill move the inlet closer to the return to reduce stagnant points between them and then put a powerhead on the left well to propel the water more behing the rocks. Thank you!

HI JuanSan,

If you want to use the powerhead as a delivery method for CO2 I would suggest the Hagen Aquaclear Powerhead models with the venturi air (CO2) input and adjustable output. Likely the Model 20 or 30 would do the job depending upon the current GPH flow from your filter.
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Last edited by Seattle_Aquarist; 07-03-2016 at 04:41 AM. Reason: sp
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post #6 of 9 (permalink) Old 06-30-2016, 09:55 PM
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To me your setup looks fine. I can't imagine you need a powerhead on a 15G. What kind of canister are you running?
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post #7 of 9 (permalink) Old 07-01-2016, 01:12 AM Thread Starter
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HI JuanSan,

If you want to use the powerhead as a delivery method for CO2 I would suggest the Hagen Aquaclear Powerhead models with the venturi air (CO2) input and adjustable output. Likely the Model 20 or 30 would do the job depending upon the current GPH flow flow from your filter.
Thank you for the recommendation. I am using an Eheim Ecco Pro Easy 35 canister filter (132 gal./hour).

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To me your setup looks fine. I can't imagine you need a powerhead on a 15G. What kind of canister are you running?
Eheim Ecco Pro Easy 35 is rated to run 132 gal/hour. I moved the lily pipes to be closer together towards the front of the tank. I think this will help a lot with my flow problems as I disturbed some of the areas where diatoms were prevalent and they havent come back yet. I will watch the flow for a couple of days to verify that I indeed fixed the issue and then make my decision whether I need a power head.
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post #8 of 9 (permalink) Old 07-01-2016, 03:16 PM
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Eheim Ecco Pro Easy 35 is rated to run 132 gal/hour. I moved the lily pipes to be closer together towards the front of the tank. I think this will help a lot with my flow problems as I disturbed some of the areas where diatoms were prevalent and they haven't come back yet. I will watch the flow for a couple of days to verify that I indeed fixed the issue and then make my decision whether I need a power head.
That's plenty for a 15G. You can certainly get a powerhead it won't hurt anything but there is no real connection between most algae and flow.
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post #9 of 9 (permalink) Old 07-01-2016, 04:38 PM Thread Starter
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That's plenty for a 15G. You can certainly get a powerhead it won't hurt anything but there is no real connection between most algae and flow.
If flow is not the issue, then I guess that I would attribute the occasional diatom blooms to the excess silicates in my tank. My rationale was that diatoms were non-motile so the additional flow in some of the slower areas would reduce its proliferation. I have already noted a reduction in their numbers with moving the pipes closer together and using a lily intake pipe that was at the the the substrate level. As always thank you for your insight!
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