New Study on Measured Flow Output of Prop Pumps (Powerheads)
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wangotango
Active Member
Sanjay and Bill are two awesome people that I've gotten the chance to talk with a lot.
It's funny how everyone puts Tunze on a pedestal but after these tests I don't think I can justify their price for the performance they get. Stick with Vortechs
It's funny how everyone puts Tunze on a pedestal but after these tests I don't think I can justify their price for the performance they get. Stick with Vortechs
2quills
Well-Known Member
Tunze's response to the claims. Gotta at least give them credit for agreeing that the test was correct. http://www.reefcentral.com/forums/showthread.php?t=2043590
sweatervest13
Active Member
Anyone what to buy some Tunze's PH I got??? Just kiddin. LOL
I bet they are reeling from this paper. Not a good day over there for the folks at Tunze!
The Koralia 5 seemed to perform well. I would get one of those before I got a 6,7, or 8. Weird.
I bet they are reeling from this paper. Not a good day over there for the folks at Tunze!
The Koralia 5 seemed to perform well. I would get one of those before I got a 6,7, or 8. Weird.
slice
Active Member
The advertised GPH vs Measured GPH really didn't catch my attention as much as the "width" of the flow pattern as shown in the "Velocity vs Position" graphs.
Vortech calls out their wide flow pattern as a major selling point and I was delighted to see it measured according to the claims (not that I doubted it, my MP10s affect way more area than those Koralias ever could).
Look at the graph for the Maxijet 1200. That thing ain't nothing but a squirt gun.
Vortech calls out their wide flow pattern as a major selling point and I was delighted to see it measured according to the claims (not that I doubted it, my MP10s affect way more area than those Koralias ever could).
Look at the graph for the Maxijet 1200. That thing ain't nothing but a squirt gun.
monsinour
Active Member
Quote:
Originally Posted by Slice http:///forum/thread/386642/new-study-on-measured-flow-output-of-prop-pumps-powerheads#post_3397269
The advertised GPH vs Measured GPH really didn't catch my attention as much as the "width" of the flow pattern as shown in the "Velocity vs Position" graphs.
Vortech calls out their wide flow pattern as a major selling point and I was delighted to see it measured according to the claims (not that I doubted it, my MP10s affect way more area than those Koralias ever could).
Look at the graph for the Maxijet 1200. That thing ain't nothing but a squirt gun.
The maxijet was used as an example of an impeller design, not a comparable unit.
I have the korilia evo 240's in my tank and I am just slightly thinking that they arent strong enough. I think I have proper flow. I have thought about a MP-10 for my tank, but only in passing.
I will say that I love Roger and his approach on a forum. In all his posts he doesnt back down from the error, adamantly stating it will be fixed, and it certainly seems like there wont be much of a charge for the fix if any. I also liked that he stated that there wernt complants before the study so why complain now?
Originally Posted by Slice http:///forum/thread/386642/new-study-on-measured-flow-output-of-prop-pumps-powerheads#post_3397269
The advertised GPH vs Measured GPH really didn't catch my attention as much as the "width" of the flow pattern as shown in the "Velocity vs Position" graphs.
Vortech calls out their wide flow pattern as a major selling point and I was delighted to see it measured according to the claims (not that I doubted it, my MP10s affect way more area than those Koralias ever could).
Look at the graph for the Maxijet 1200. That thing ain't nothing but a squirt gun.
The maxijet was used as an example of an impeller design, not a comparable unit.
I have the korilia evo 240's in my tank and I am just slightly thinking that they arent strong enough. I think I have proper flow. I have thought about a MP-10 for my tank, but only in passing.
I will say that I love Roger and his approach on a forum. In all his posts he doesnt back down from the error, adamantly stating it will be fixed, and it certainly seems like there wont be much of a charge for the fix if any. I also liked that he stated that there wernt complants before the study so why complain now?
acrylic51
Active Member
Very good article, but still doesn't solve the issue with the Vortech not catering to people with thick builds thicker than 1"????
And in the back of my mind I still remember a tank (possibly) damaged by heat from a Vortech???? IMO I never felt Vortech gave an upfront answer on the issue.
2quills
Well-Known Member
It was a good study with some interesting results. Indeed strange to see the Koralia 5 results. Would be interested to see the same test done with multiple units of the same brands and models to see if or what any differences might be between the same units. It doesn't sound like Tunze is going to take this laying down. Both Tunze and Vortechs are great pumps I don't think there's any doubt about it. I don't think that either brand is really worth the price they charge to be honest. Between Tunze's over estimated numbers and Vortech seemingly leading the way with problems with their units I'm not really sure what to think about which is really better. I think Tunze are known to be a bit more reliable and yet Vortech has some really nice features in their units that people like as well. I do believe that Echo Tech has made some upgrades to eliminate alot of the older issues people had with them. I think the damage that was done to the acrylic tank from heat was an isolated issue from what I could find, a bit of anomaly I suppose. I actually did alot of digging and looking into that a while back if I do recall and could only find people talking about the one incident. I'm still torn on which to buy for my build. Vortech is leading the way specifically because the motor is outside of the tank and I wish to minimize heat in the system as much as possible. The low profile design is a big seller for me as well. Both do seem to have really great customer service at least.
acrylic51
Active Member
But what people fail to realize that it's not really a fair comparison, because in nature they are different style of pumps.....Same concept but different. It's highly possible those test results aren't as accurate as we are led to believe. Not doubting the individuals that conducted the tests.......
http://reefcentral.com/forums/showthread.php?t=2045940
http://reefcentral.com/forums/showthread.php?t=2045940
2quills
Well-Known Member
Quote:
Originally Posted by acrylic51 http:///forum/thread/386642/new-study-on-measured-flow-output-of-prop-pumps-powerheads#post_3399604
But what people fail to realize that it's not really a fair comparison, because in nature they are different style of pumps.....Same concept but different. It's highly possible those test results aren't as accurate as we are led to believe. Not doubting the individuals that conducted the tests.......
http://reefcentral.com/forums/showthread.php?t=2045940
No it sounds more and more like the tests were not nearly complete enough to give a fair comparison of the different style of flow that all of these pumps produce. They need to do more testing on more than one axis to give a better idea of what all of these pumps are capable of and not simply just 1 diameter down stream of the pump which actually works out in Eco Techs favor. Supposedly they ran out of time and money to continue to do more study. Will be interesting to see where this continues to go and what advancements will be made.
Originally Posted by acrylic51 http:///forum/thread/386642/new-study-on-measured-flow-output-of-prop-pumps-powerheads#post_3399604
But what people fail to realize that it's not really a fair comparison, because in nature they are different style of pumps.....Same concept but different. It's highly possible those test results aren't as accurate as we are led to believe. Not doubting the individuals that conducted the tests.......
http://reefcentral.com/forums/showthread.php?t=2045940
No it sounds more and more like the tests were not nearly complete enough to give a fair comparison of the different style of flow that all of these pumps produce. They need to do more testing on more than one axis to give a better idea of what all of these pumps are capable of and not simply just 1 diameter down stream of the pump which actually works out in Eco Techs favor. Supposedly they ran out of time and money to continue to do more study. Will be interesting to see where this continues to go and what advancements will be made.
acrylic51
Active Member
I'm not swayed either way by the test results....Again very credible people conducting the tests......Sanjay's work speaks for itself. I just find it very hard to believe that Tunze "supposedly" was that far off????
As Roger stated how the Tunze pumps are designed and what they were after in the pump wouldn't generate the flow numbers the way the test was conducted. One of my favorite lines is...."Figures lie, and liars Figure.." Not calling anyone a cheat or liar, but when you have people that run both pumps and they stated their findings and views on the flow capabilities it's kind of hard to not believe real end users!!!!!!!!! I think Roger and Tunze are on to something though....Definitely waiting to see if the new series of tests are conducted.
2quills
Well-Known Member
Tunze being sued over this??? Ouch!!! http://www.advancedaquarist.com/blog/law-firm-announces-investigation-on-tunze
snakeblitz33
Well-Known Member
Hah! Well, they should have done their research. I was never really impressed with Tunze anyways. Too expensive for my blood for one, and if it was great and amazing like they said it was, then more people would be using them. But I guess that's just me.
I hate to see them be sued, but they did misrepresent their products.
I hate to see them be sued, but they did misrepresent their products.
acrylic51
Active Member
:laughing: Snake their is no standardize method of testing persay..... Who's to say that how Tunze bench tested their pumps would the Vortech's and such yield the results the posted in the first test?????? I don't care either way, because I'm not loyal to either company, but have you really ever heard any Tunze users complain about flow output??? I own a pair, but have never even fired them yet. Vortech doesn't even offer a product for thick build products off the shelf, so they don't have a product for me to even look at. Heck they have issues with their stuff staying together!!!!
How is it misrepresentation when there's no industry standard????? By the way "who" paid for the tests???? Kinda reminds me of the PFO demise!!!!!
How is it misrepresentation when there's no industry standard????? By the way "who" paid for the tests???? Kinda reminds me of the PFO demise!!!!!