If you review the Technical Data of the Hydro HP its pretty easy to prove you've taken a step back. I guess the old adage "you get what you pay for" rings true. I'm sure it will be fine if you change it often enough, but that destroys the whole cost savings behind getting a cheaper product. The test data is insufficient and the text is vague. It's been my experience when the TD sheet lacks info, the company trying to mislead the reader.