I don't post a lot here, but Brew can atest to my experience. I have used Stericups for well over a year now and really like them a lot. There are some things that will make your filtering go much better. First, I preffer the PVDF .45um. They filter much quicker. Second, the thickness and viscosity of your solution plays a big part in how quickly it takes your progect to filter. Third, the higher the consentration of hormone the slower the process goes. Lastly, the temp of the solution needs to be less then 110 degrees to prevent breakdown of the plastic. It will filter much quicker at high temps, but the vesel walls will breakdown and pass through to the final product. Let me give you my worst case experience. It was 1,000 mls of EQ, it took almost 9 hours. I have since adjusted my recipe a tad and thined it out. This was also a .22 filter. My average 1,000 ml project with a .45 filter now takes me from 60-120 minutes.
One other item of interest is to ensure there are no vacuum leaks. This can slow the process considerably. Hope this helps. Hope this helps. Take care. TY