Independent study on propeller pumps

[atlorange]

 

[weaglereefer]

Not to discredit the study, but I do find it humorous that many would consider Tunze as Eotech's main competitor, and Eotech pumps exceeded advertised rates while Tunze fell short. Eotech funded the study, lol.

Not saying I don't believe, just interesting to note and take it with a grain of salt.

 

[smallblock]

I enjoyed reading that thank you for posting

 

[atlorange]

weaglereefer;665958 wrote: Not to discredit the study, but I do find it humorous that many would consider Tunze as Eotech's main competitor, and Eotech pumps exceeded advertised rates while Tunze fell short. Eotech funded the study, lol.

Not saying I don't believe, just interesting to note and take it with a grain of salt.

Yeah, I don't know what to make of that. I have seen quite a number of successful large systems apply Tunze for water movements. However, it does look like TUNZE is not calling into question the data produced by the study:

"Before Tunze Stream 2 owners go reaching for their pitchforks, keep in mind that these types of flow measurements are extremely hard to do. Up until the last couple of years, it would have been prohibitively expensive to buy or rent the kind of equipment necessary to measure the flow as performed in this study. There is an important note in the addendum to the paper about Tunze’s reaction to the results of the flow study:

Based on these results, Tunze conducted its own independent tests on the Tunze pumps and have confirmed our results. On further discussion with Tunze we do not feel the errors were deliberate attempts to mislead, but rather their misguided faith in theoretical calculations that often do not translate well into real world application and use. In light of these finding Tunze is working to remedy the situation.
​

Although the output and ratings of Tunze Stream 2 pumps show a big difference in output, it doesnt change the fact that many large successful reef tanks have been using large Stream pumps for many years. We have learned that Tunze has already begun to identify the reasons for the shortcomings between the calculated output of Tunze Stream pumps and their measured flow rate. Stay tuned for an official statement from Tunze which outlines their position on this study and how they have identified ways to actually increase the output of the 6105, 6205 and 6305 for existing owners of the Stream 2 propeller pumps."