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Old 04-30-2009, 12:22 AM   #1
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Water Flow

So every place I read seems to tell me something different for what the water flow of my tank should be. I have a 75G tank that I want to set up as a reef and have been trying to figure out what my GPH water flow should be. From what I've been reading around 1700 GPH would be about right or should I go a little bit higher or lower.
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Old 04-30-2009, 01:41 AM   #2
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1700GPH would be 22x turnover rate. Higher is acceptable and will in general be better. The goal is to get all the water around the rocks and trying to eliminate dead spots.
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Old 04-30-2009, 09:24 AM   #3
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So what is the turnover rate that I would be looking to achieve in my aquarium, or any for that matter.
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Old 04-30-2009, 09:28 AM   #4
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20-30 is what most recommend. In my 55 im at around 40 lol.
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Old 04-30-2009, 09:32 AM   #5
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So I should be looking more into the 2000 area?
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Old 04-30-2009, 09:46 AM   #6
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Also what would be the best way to position the powerheads. I've heard that having them at opposite ends of the tank pointing up towards the surface and having there flows form an X works rather well.
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Old 04-30-2009, 12:49 PM   #7
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just got back from lfs and bought two koralia 4 for my 75g. Right now I have them at opposite ends of the tank pointing yowards the surface making an x. Will this work?
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Old 04-30-2009, 05:37 PM   #8
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I have 2 Koralia 4's in my 72G and found that I had to move them around quite a bit until they quit blowing my sand all over. Just keep an eye on them with the substrate.
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Old 04-30-2009, 05:44 PM   #9
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They were creating a vortex of bubbles in the center until I moved them a bit. They seem to be okay now
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Old 04-30-2009, 06:11 PM   #10
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I have a #1 and a #4 in my tank lol. which mine is only a 55g. I had to (like mtlion said) move my #4 around some to find a good position for it. You should aim for a 20x turnover rate or greater. anything above 1800+gph would be great. however 2000+gph will be even better.
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