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Old 06-01-2009, 01:22 PM   #1
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Powerhead

Hey guys sorry seem to be flooding the threads with posts lately but trying to do my new tank right. I was looking at powerheads for my waterflow and didn't know how much gph i needed. my tank is a 30g L and i plan on having polyps, mushrooms, anemone, and eventually moderate light soft corals. would 400gph be sufficient or should I get a little larger one like 600gph? Or do I really need like two small ones in different spots to help waterflow everywhere? thanks for any help
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Old 06-01-2009, 01:29 PM   #2
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Don't worry about flooding with posts, I don't think anyone had any problems with questions here, I did the same thing while setting up! I don't have any corals in my tank but I understand that they do need a higher flow than just a FOWLER. I have two Koralia 3 PH in my 72G FOWLER and the flow seems right. I did have 2 Koralia 4 PH but they seemed to be too much current for my fish to fight. I think I have read you should have 10x turnover, but I think that is the minimum for corals. Try researching a wavemaker if your budget allows. I am thinking of getting one for my FOWLER in the future. I would definately go with more the one PH though.
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Old 06-01-2009, 01:52 PM   #3
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K thanks, I think I will go with 2 of the 400gph powerheads. this gives me roughly a 25times turnover an hour. I just hope that is not too much.
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Old 06-01-2009, 02:29 PM   #4
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The way you direct the flow will be what matters versus "too much". 10x is something I shoot for in my FW tanks. In reef tanks, I aim much higher. I know someone who actually runs at about 200x turnover.
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Old 06-01-2009, 03:37 PM   #5
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K Im gonna go with 575 which is a 19X turnover. How should I direct the flow? Point one of the powerheads at the live rock / landscaping I have and the other one just in a random direction to try to keep from having a dead spot?

thanks for your input
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Old 06-01-2009, 03:42 PM   #6
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The best way is through trial and error. In general, you'll want a PH pointed at (or near) your corals that prefer higher flow. Other than that, it's up to you and the behavior of your critters. Oh, and don't point it at your sand.
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Old 06-01-2009, 04:17 PM   #7
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I would also consider pointing one slightly near the surface for good aeration. Good surface aggitation will accomplish that.
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Old 06-01-2009, 11:56 PM   #8
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I have mine pointed into into an imaginary "x", but I don't have corals to worry about. That give me good surface agitation and a good water column into my overflow.
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