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Old 04-27-2005, 07:15 PM   #1
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How much GPH powerheads

Is there a rule of thumb for how much gph from powerheads one should use in a tank?
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Old 04-27-2005, 07:19 PM   #2
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What siz is the tank? Generally with marine aquariums, 10x the size of the tank is a good rule of thumb.

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Old 04-27-2005, 07:27 PM   #3
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Yup at least 10x the size of the tank. I have two Maxi-jet 1200(295gph) in my 50.
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Old 04-27-2005, 07:58 PM   #4
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I just ordered 2 seio 620 gph and I have 1 maxJ 900 for a 72 gallon tank. That's about 20x. Is that to much?
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Old 04-27-2005, 08:04 PM   #5
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That should be good. Over is better than under. Just position them so the sand doesn't blow all over. I have 3 MJ1200's in mine, plus the overflow pump. The MJ1200's are positioned: 1 in the center, and the other 2 in the back corners facing towards the middle of the tank. Try to keep them close to the surface for water agitation for better gas exchange.

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Old 04-27-2005, 08:27 PM   #6
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20x/hr is good for most reef tanks.
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Old 04-27-2005, 10:19 PM   #7
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20 times per hour on a reef is real good. Any hard corals are better off with more flow than 10 times per hour, faster growth.
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Old 04-27-2005, 10:24 PM   #8
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In addition remember you dont want a jet stream of water instead you want good random water movements. TO do this you can position powerheads toward eachother so the water interacts with the other powerhead's current.
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Old 04-28-2005, 12:03 AM   #9
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I got myself a Tunze stream kit to replace 6X maxi 12s and I am really happy with it. It pushes about 3800 gallons an hour in my 105G tank, but the corals are eating it up and the included wave controller makes a very realistic wave action. They are kind of pricey and very cheaply made, but they work like a champ.
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Old 04-28-2005, 12:11 AM   #10
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I have a 30 gal hex, but not planning on corals, do I need a powerhead?
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