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Old 07-29-2013, 09:05 PM   #91
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I think we can agree about saving money if you already have a good skimmer, but think it is under rated for your system, you can just buy another small unit and make up the difference. Good skimmers are pretty expensive, so opting to ditch your old one for a bigger new one is a real consideration.
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Old 07-30-2013, 10:58 AM   #92
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If the choice to be made depends on a budget then yes but your effective skimming is limited to the remaining lifespan of the older unit. While a new bigger unit may cost more but it allows for longer usage and the older one can be stored as back up.
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Old 07-30-2013, 12:52 PM   #93
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Quote:
Originally Posted by Chris J View Post
The term "efficient" is being used in two different ways. On Mr.X's side efficiency is being used to describe the skimmers ability to pull out DOC's where as on Jeff's side he's using it to describe power consumption vs the amount of DOCs pulled out. Mr.X is correct in stating that one skimmer does NOT effect the others ability to pull out DOCs it just causes there to be less DOCs which in turn causes the other skimmer to be unable to pull out as much because there simply is nothing left for it to skim. It doesn't make the skimmer less efficient, it does however mean you are powering a piece of equipment that isn't working at its full potential thusly making it "inefficient" to run. In summary, I side with Mr.X, two skimmers in a sump setup don't effect each other, they both effect the water so when one pulls all the DOCs it appears as if the other is less efficient only because there are no DOCs left to pull out and the skimmers did their job "efficiently" but it is "inefficient" power consumption wise to run a skimmer that isn't skimming or only skimming half the amount it could... Clear as Mud I'm sure.
Well stated Chris ,but I really don't think this topic has a clear and final answer ,.."efficiently" may depend purely on the individual and his tank and what he or she is looking for,...for me and my tank,..I tried a couple of different units and although some seemingly did a nice job ,to me they were lacking in something making them less "efficient" in my book . I actually opted for a monster recirculating old school unit that requires two pumps to run,...one to feed it water and a giant pump to recirculate that water,..."efficient" ?? Power wise no,... Peace of mind wise and "efficiently" wise removing the gunk ? absolutely yes .,so to me ,this setup was my most "efficient" way go.
I would have to agree with most folks here that no matter how you look at it,it's a compromise,...too many variables to consider , design wise ,power wise etc,...BUT, if put in a corner and had to chose, I would prob go with the two smaller units ,..as greg said, we're talking pennies here,.redundancy can be a nice thing to have ,..peace of mind ,.making it more " efficient",.. ask any airline pilot.
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Old 07-30-2013, 02:03 PM   #94
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I am a pilot and I like back up.
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Old 08-13-2013, 12:42 AM   #95
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I run a nac9 on my 180. Really in this hobby if you want the best looking tank throw out efficiency power wise. Look at the numbers and, water flow and cf of air. Mine is rated at 395g on heavy load. I haven't changed my water in 5 weeks as I have no trace of nitrates and dose everything else. That's another thing to look at is if you get more skimmer may help with less water changes. Either way you look at it just compare how much air to water it pulls out. That's what it all comes down to.
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