Tunze - False Advertisement?

[tkeracer619]

Ouch that hurts

 

[NVfishman]

What im getting at is that Tunze was talked up as the greatest powerheads ever and this was the impression I had. Oviously when a company markets and sells a product they do tests to see the performance on the units. We all trusted that the gph and quality were there hence the $700 per 6305 power head they get per unit. If i had known that false information was given I would have went with korilla 8 for $100 saving $600 a unit so for $1200 less I would have got almost the same water flow this is where the problem is.
Dont get me wrong i love the pumps they are durable and last a long time and Roger really hooks us up if there is a problem, but I did not need to spend anywhere near the price to get a comparable pump.

How would tunze come up with there gph without doing some sort of test from the getgo?

 

[Mindflux]

Their tests weren't accurate. That's how.

 

[Mindflux]

Not to derail, but we've got one of those Jetta TDI's (the "sportwagen" variant). My wife drives ~100 miles per day (most of it on freeway) and she *averages* ~45mpg. She's hit 50 before now.

Normally I'd not bother with an anecdote like that, but since Tunze seem to be getting in so much hot water when they clearly didn't intend to defraud, I just thought I'd mention it - we really like our VW [grin].

Simon

Ours is a 2010 sportwagen. 75 miles a day mostly highway. Have yet to break 40MPG. Even on a long 8 hr round trip 400+ mile drive the average barely goes up. (calculating miles driven on trip meter/ gallons put in at fill up). The estimation by the computer is... Generous.

 

[SpacedCowboy]

Ours is a 2010 sportwagen. 75 miles a day mostly highway. Have yet to break 40MPG. Even on a long 8 hr round trip 400+ mile drive the average barely goes up. (calculating miles driven on trip meter/ gallons put in at fill up). The estimation by the computer is... Generous.

The calculation I'm using is simply "how many gallons we put in at the pump" vs "distance travelled". The computer is wrong often, sometimes high and sometimes low - I've done enough fluid dynamics myself to not empirically trust computers ...

I'm not sure if "highway" = "freeway" (it's all "motorway" where I come from ) but her trip is pretty much all freeway (we live close by an on-ramp, and her work is close by an off-ramp). She does drive ... more sedately ... than I do, however. Perhaps that's part of it.

Simon.

 

[Mindflux]

The calculation I'm using is simply "how many gallons we put in at the pump" vs "distance travelled". The computer is wrong often, sometimes high and sometimes low - I've done enough fluid dynamics myself to not empirically trust computers ...

I'm not sure if "highway" = "freeway" (it's all "motorway" where I come from ) but her trip is pretty much all freeway (we live close by an on-ramp, and her work is close by an off-ramp). She does drive ... more sedately ... than I do, however. Perhaps that's part of it.

Simon.

Sounds like the calculation we are doing is the same. I zero out the trip meter after we pump. Take the last trip meter reading divided by gallons put in. So, say 450 miles / 13 gallons = 34.61 MPG. which seems about right for us.

Highway = freeway, yes. We're close to the on/off ramps and my wife too drives much more sedately than I.

 

[jcw]

My toyota highlander hybrid averages only 24 mpg.

BTW, Tunze is a quality pump. How many vortech wetside repairs/dryside repairs do we see here on RC? How many noise issues do we hear about? SkullV did you get your issue straightened out?

Regardless of this study's measured gph. They are a quality pump.


It's like complaining my 600hp Bentley Continental SuperSport is crap because it can't do the quarter mile as fast as a 600hp Chevy ZR1.

 

[James77]

Dont get me wrong i love the pumps they are durable and last a long time and Roger really hooks us up if there is a problem, but I did not need to spend anywhere near the price to get a comparable pump.
How would tunze come up with there gph without doing some sort of test from the getgo?

Anf after Tunze corrects this problem, what will you think of the pumps then. The same pumps you have been happy with up until hearing these test results will now have greatly increased flow. All the while keeping everything else positive about them.

It has been repeatedly posted by Roger and quotes several times, and they put out a press release explaining how they came to those numbers.

 

[James77]

It pretty much shows Vortechs to be far superior (almost twice the flow of comparable tunzes) than Tunzes.

As of right now, yes. If Tunze corrects this flow problem as they said they would...then that argument is immeidately knocked away.

 

[James77]

To say that Tunze only knew about the issue for a day or two before we did is ludicrous! They knew exactly what was going on and did NOTHING about it. I can see where the False Advertisement comes in at that point.

However, I don't think Tunze knew about this issue for months and months. I bet they had 2 weeks or so to issue some kind of statement but chose not to. Why?
.

Not one single person outside of Tunze or AA knows how long Tunze was given the info beofre the article was published. IDK if it was weeks or days.....but i am not about to judge them on some specualtion. Given their history in this hobby, I am willing to give them the benefit of the doubt.

I really hope you do try Tunze pumps. I know you are a big Vortech fan- rightfully so, they are great pumps- it would be interesting to see your thoughts on Tunze.

 

[tkeracer619]

BTW, Tunze is a quality pump. How many vortech wetside repairs/dryside repairs do we see here on RC? How many noise issues do we hear about? SkullV did you get your issue straightened out?

Regardless of this study's measured gph. They are a quality pump.

Here is a 6305 that needed zip ties to keep it from blowing apart and spreading its parts around the aquarium.

Here is a different 6305 titanium shaft rusted that caused the impeller to lock up.

What about the pumps that failed before these two and roger replaced them with the 6305s?

What about the 3 6305s that had to be warrantied because the motor blocks failed?

What about the nanostream that crumbled in my hand?

How about start up issies on thier standard pumps?

Lets not turn this into a quality debate because trust me we don't want or need to go there.

 

[James77]

As I understand it the company is based out of texas. At least the us division is.

Roger in Austin TX does run the US service of Tunze. Tunze itself is based in Germany, with similar reps throughout the world.

 

[James77]

Lets not turn this into a quality debate because trust me we don't want or need to go there.

Just as many problems and be pointed out with Vortech pumps as well.
Tunzes are very reliable, the majority of them run for years with zero problems. I ahve never had a defective motor or anything in the 7 years Ive run them. My problems were limited to poor clamps on nanostreams, and noisy 6105s....all of which were corrected at no charge.

 

[tkeracer619]

Exactly

 

[jcw]

Lets not turn this into a quality debate because trust me we don't want or need to go there.

I don't mind going there.

There are a lot more complaints about Vortechs than Tunzes. Maybe Vortech outsells Tunze but I doubt to that degree.

The first thing I noticed when I opened the Vortechs (I have 3 mp40s and 2 mp10s) is that the tolerances on the pump seem excessive. The plastic is thin. I've read many for sale threads re wet sides cages with minor damage (broken struts).

The wet side rattles in your hand. Same with the dry side.

When put on some rattle more than others.


I like the vortechs. But more the design concept and control than the execution.


Not that Tunzes are without fault. The Nanostreams have some of the worst clamping mechanism I've seen. And yes, they (nanostreams at least) don't always stop and start reliably.

 

[James77]

Maybe we could go there in any other one of the hundreds of Tunze vs vortech threads that exist. It would be nice to keep this on topic.

 

[Mindflux]

I like the vortechs. But more the design concept and control than the execution.


Not that Tunzes are without fault. The Nanostreams have some of the worst clamping mechanism I've seen. And yes, they (nanostreams at least) don't always stop and start reliably.

What is it about the clamping mechanism you don't like? I like the C clamp, what I don't like is the brittle tabs that lock the clamp onto the magnet. Supposedly changes in plastics have remedied most of that.

 

[jcw]

What is it about the clamping mechanism you don't like? I like the C clamp, what I don't like is the brittle tabs that lock the clamp onto the magnet. Supposedly changes in plastics have remedied most of that.

That's what I meant. Not the c-clamp.

 

[jcw]

Maybe we could go there in any other one of the hundreds of Tunze vs vortech threads that exist. It would be nice to keep this on topic.

Agreed

 

[tkeracer619]

In my last post I left out that roger fixed all of the failures no questions asked.