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Old 05-12-2003, 04:40 AM   #11
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is a wave maker or osciwave an important addition? i think im leaning toward a reef tank but not sure. what do these devices do?
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Old 05-12-2003, 08:04 AM   #12
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It is important to replicate as much of the natural rhythms of the ocean in our tanks - thus the term mini-reef. An important element of that is wave motion which brings food to the corals and removes wastes as well. Most corals have one common orafice for input and output so having current is essential. A variable current, is more natural, less stressful on the organism and contributes to even growth.
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Old 05-12-2003, 09:36 AM   #13
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Old 05-12-2003, 01:47 PM   #14
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so in that case should the water flow in the tank be a large amount like 25% or should it be less?
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Old 05-12-2003, 02:06 PM   #15
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Water flow in the tank should = at least a minimum of 10 X per hour or 1000%. So if the tank is 20g you want a minmum combined waterflow of 200gph. Possibly higher, depending on the rockwork and what your keeping. In my tank I figured it up once I have approx 27 X per hour combined waterflow, when everything is running, but my 2 powerheads are on a wavemaker, so they only run at the same time as everything else, maybe 40% of the time, other times one of them is running, it's completely random. There is approx 10-15 X per hour flow all the time with the other equipment (ie; skimmer, return from fuge...these run 24/7).
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Old 05-12-2003, 02:57 PM   #16
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ok so i need a wave maker. but how many powerheads? if i understand correctly the flow should be roughly 500gph
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Old 05-12-2003, 03:14 PM   #17
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On a 36" tank, I would use a min of 2 and probably would use 4. I would shoot for a combined min of 500gph, possibly higher, this would include the return from a sump.
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Old 05-12-2003, 03:23 PM   #18
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ok so what about the overflow? does that have a flow rating as well?
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Old 05-12-2003, 03:42 PM   #19
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Yes overflows have a gph rating, it really would depend on your overflow, to find this out, contact the manufacturer of your overflow. If the tank is drilled and it is a built in overflow, don't worry about it, you won't exceed it. BTW, the Powerheads in the tank will not effect the amount of water going to your overflow, only the pump in your sump effects that.
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Old 05-12-2003, 08:16 PM   #20
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are the powerheads in a kind of cross pattern. to give a crossing current pattern. in my fresh if i were to do that my fish would freak. but in a reef there are a number of currents the animals are dealing with.
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