I'm not sure what your beef is. I can almost guarantee they didn't know this "from the day" that the 6105 was made. If you're upset that they didn't immediately post something when contacted by the authors, you're basically upset that they didn't take the data at face value. They've said that they are working to confirm the data, obtained with equipment which is fairly pricey, and are running further tests to make sure that the data is accurate. Measuring flow is not an exact science, especially when you take into account real life scenarios. What if another study shows that Vortechs lose 1/2 their output if there is rockwork in front of them while Tunze only loses 10% (not saying this is true, purely hypothetical). Would you castigate Vortech for not running that test ahead of time or would you assume that any disparity was unintentional? Given Ecotech's reputation, I would assume the latter there as well. You act like product testing is an inexpensive process. Tunze is a big name in aquariums but it's not a huge company. I doubt they have more then 20 employees.
In addition, they're planning on retrofitting the old pumps. If the cost of manufacturing a 6305 goes up from 300 to 315, wouldn't you expect the price to the consumer to go up as well?
Given the reputation of the company, the absolute integrity Roger has shown in every dealing I've ever had with him (and to my knowledge, anyone else he's dealt with), and the results that we've seen in tanks that use Tunzes, I have serious doubts that any attempt was made to deceive any customers.
If you are unhappy with your Tunze equipment, post it for sale and don't buy from them. Otherwise, please stop saying things that have no factual basis. It's natural to be upset when you perceive that the equipment you obtained doesn't meet the specifications that it purports. However, each company has put out products that don't meet what the specs report. Do you believe the gallonage specs for most protein skimmers out there? Even great companies like Bubbleking will put out products that don't end up working in the real world. They don't do so to deceive but because these things aren't always easy to test. I used to own a BMW 3 series and had to repair the automatic windows at 50K miles. My mechanic says it's a known problem with them and almost all of them for a couple years needed that repair. However, BMW, a company with a lot larger customer base and R&D budget, didn't catch it. To compound things, they didn't offer a recall or any discount in fixing the problem.
I've been happy with the Tunze equipment I've owned, from the 230 skimmer I bought years ago to the numerous Tunze powerheads and waveboxes I've owned. The company has always supported their product and the products have worked well. No theoretical test is going to make me stop using their products and I think it's a bonus to see that Tunze is going to step up to the plate and do their best to remedy the situation.
