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Old 12-19-2013, 10:33 AM   #1
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Powerhead placement on 20g setup

Hi, I recently bought a 20g setup, and I don't know where to put my powerhead.

This is what I did, but my clownfish don't seems to like it, they alway need to swim to stay in place, even if it is the night. I plan to have some corals.


That's a 600GPH powerhead.



Maybe something like that would be better ? I really have No ideas on how to place it...


I have a single powerhead
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Old 12-19-2013, 11:51 AM   #2
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A 600gph powerhead is too big for a 20 gal. Go with two smaller 300gph powerheads.
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Old 12-19-2013, 12:23 PM   #3
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But at now I can only deal with this 600 gph powerhead... How should I position it ?

Will my second image be better than the first ?
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Old 12-19-2013, 12:35 PM   #4
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the 600 will cause a rip current
you be better off with 2 smaller 300 one on side wall pointed to opposite side
and one on back wall pointed to the front wall on opposite side
this will break up the rip current
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Old 12-19-2013, 01:31 PM   #5
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You could try putting it on the back wall aiming at the front of the tank. The water hitting the front will break up the flow a lot.
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Old 12-19-2013, 02:32 PM   #6
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Quote:
Originally Posted by Mebbid View Post
You could try putting it on the back wall aiming at the front of the tank. The water hitting the front will break up the flow a lot.
This would be worse than the ends if there is a sand bed.

Your best option would be to just aim the powerhead directly at the rock to hope it gets diffused some. Aim for the highest rock so you don't get sand blowing everywhere. You're basically running an outboard motor in a kiddie pool. It's just too much flow from one source in such a small tank.
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Old 12-19-2013, 03:01 PM   #7
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This would be worse than the ends if there is a sand bed.

Your best option would be to just aim the powerhead directly at the rock to hope it gets diffused some. Aim for the highest rock so you don't get sand blowing everywhere. You're basically running an outboard motor in a kiddie pool. It's just too much flow from one source in such a small tank.
That would depend on the type of sand bed. If there is Sugar sand in the tank then yes, it would be problematic. Larger grades than that though don't get blown around anywhere near as much.
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Old 12-19-2013, 03:08 PM   #8
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That's very small sand, it move easyly with the powerhead.

What about if I put the powerhead the most at bottom and the middle of the side glass aiming the rear glass pointing on top... Hmmm sorry I have bad english and it's hard to tell what I mean, so here another paint picture:

I mean the fan is on the middle of the wall but the lower possible near sand, and propelling the water on the rear glass toward up direction... Do you understand what I mean or it's too unclear ?

I know it would be great to have dual 300 gph, but I can't have a refund for my koralia pump... I didn't keep the box and the manuals...
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Old 12-19-2013, 03:55 PM   #9
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I would put at top aimed at mid glass less chance of blowing sand all over
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Old 12-19-2013, 03:58 PM   #10
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When I'll be back at home, I'll try what I said on the third picture, and try what 54seaweed said, at top aimed at mid glass.

I'll give you news
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