Tag Archives: Flow

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Bringing the Lab to the Reef

Technology is ever-present in the lab as well as the hobby of reef keeping but scientists from Europe are now going to be taking their instruments directly into the field, or reef I should say. To better understand coral metabolism and respiration researchers from Denmark will be deploying remote operated vehicles (ROV) and high-resolution cameras to help them deploy lab equipment and take measurements. “Traditionally the metabolism of cold-water reefs are typically investigated by collecting animals and analyzing them in a laboratory. Preferably, however, researchers would like to do the opposite, and bring the laboratory to the seabed, where the reef can be studied in its own environment. Since cold water reefs grow incredibly slowly — about 5 mm per year — and are fragile habitats, we were looking at novel techniques that could be used on a reef to asses metabolism with little impact on the reef structures,” says Dr. Lorenzo Rovelli, Scottish Association for Marine Science (SAMS), visiting researcher at the Nordic Center for Earth Evolution (NordCEE), Department of Biology, University of Southern Denmark.150506111513_1_900x600 Employing a method termed ‘Aquatic Eddy Covariance’ the team will be able to simultaneously measure oxygen content and flow. “We are particularly interested in finding out how much carbon is being turned over by a reef — and by that I mean the whole reef community. The community consists of the corals, which are the engineers behind the reef structure, as well as all the other organisms that inhabit the reef: from large crabs to microscopic organisms. Currently, we still do not know if and to what extent such reefs are contributing to the global carbon budget.” Read more here!… More:

Corals Stir up Their Own Cocktails

A new paper published by MIT has provided a deeper understanding into how coral utilize their external cilia in respiratory and metabolic processes. “These microenvironmental [findings] are not only important, but also unexpected,” says Roman Stocker, an associate professor at MIT and senior author of the paper.  “The general thinking has been that corals are completely dependent upon ambient flow, from tides and turbulence, to enable them to overcome diffusion limitation and facilitate the efficient supply of nutrients and the disposal of dissolved waste products,” adds Orr Shapiro, co-first author of the paper. “I was expecting that this would be a smooth microworld, there would be not much action except the external flow.” said Stocker. However, upon closer, microscopic inspection, he and his team found that it is in-fact “very violent.”140901211419-large“It appears that most if not all [coral] have the cilia that create these flows. The retention of cilia through 400 million years of evolution suggests that reef corals derive a substantial evolutionary advantage” Said Shapiro, and “It’s rare that you have a situation in which you see cilia on the outside of an animal,” adds Stocker. David Bourne, a researcher at the Australian Institute of Marine Science who was not connected with this research, says the work has “provided a major leap forward in understanding why corals are so efficient and thrive. … We finally have a greater understanding of why corals have been successful in establishing and providing the structural framework of coral reef ecosystems.” Read more here!More:

Tunze Silence pumps 1073.020 – 1073.040 – 1073.050: The Total Comparative Test

This is, for now, the last post on our testing with various pumps, we hope to soon have others to compare with these tests. Today we talk about the Tunze Silence, and in particular 1073.020, 1073.040, and 1073.050. All in accordance to what you can read in our introduction: Return Pumps: tests and real measurements compared

Tunze Silence 1073.020

His technical characteristics are:

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Sicce Syncra Silent pumps 3.5, 4.0 and 5.0: The Total Comparative Test

Let’s continue to speak about return pumps, following the introduction that you can read here: Return Pumps: tests and real measurements compared, and the test done with Eheim pumps: Eheim pumps 1048, 1250 and 1260: The Total Comparative Test, small Sicce Pumps: Sicce Syncra Silent pumps 0.5, 1.0 and 1.5: The Total Comparative Test and medium Sicce Pumps: Sicce Syncra Silent pumps 2.0, 2.5 and 3.0: The Total Comparative Test now we continue to analyze the biggest Sicce pumps: the Sicce Syncra Silent 3.5, 4.0 and 5.0.

Sicce Syncra Silent 3.5

His technical characteristics are:

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Sicce Syncra Silent pumps 2.0, 2.5 and 3.0: The Total Comparative Test

Let’s continue with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: Return Pumps: tests and real measurements compared, and the test done with Eheim pumps: Eheim pumps 1048, 1250 and 1260: The Total Comparative Test and Sicce Pumps: Sicce Syncra Silent pumps 0.5, 1.0 and 1.5: The Total Comparative Test now we continue to analyze the intermediate Sicce pumps: the Sicce Syncra Silent 2.0, 2.5 and 3.0. Sicce Syncra Silent 2.0 His technical characteristics are:… More:

Sicce Syncra Silent pumps 0.5, 1.0 and 1.5: The Total Comparative Test

Let’s continue with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: Return Pumps: tests and real measurements compared, and the test done with Eheim pumps: Eheim pumps 1048, 1250 and 1260: The Total Comparative Test now we begin analyzing the smallest Sicce pumps: the Sicce Syncra Silent 0,5, 1.0 and 1.5.

Sicce Syncra Silent 0.5

The technical characteristics of which are:

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Eheim pumps 1048, 1250 and 1260: The Total Comparative Test

Let’s start with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: Return Pumps: tests and real measurements compared, now we begin to analyze the first pump we had from Eheim, the Eheim 1048.

The technical characteristics of which are:

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Return Pumps: tests and real measurements compared

The project of the return pumps is now old and started with the previous article “return pumps: calculating the flow” that I invite you to read, and where I proposed an excel file, downloadable, editable with most of the pumps on the market, which were often recommended as return pumps in the forums and among hobbyists. The file made possible from the data of the pumps and the prevalence of each tank, get a pump flow rate calculated for each individual pump.

Although the file would be updated by anyone, I was always curious to know how pumps would behave in reality as well as declared by individual manufacturers.

During the Zoomark held in Bologna, Italy last year, we decided to contact some companies in the aquarium industry to do a comparative test of the pumps.

Some have enthusiastically joined, in true alphabetical order, Eheim, Tunzeand Sicce, and they have provided the pumps subject of our comprensive test.… More:

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