You mentioned that Terp Tubes are reusable, how do you clean them?
Terp Tubes can be cleaned by soaking in alcohol and then scraping out old material, follow up with a second soak in alcohol again, then clean with very hot water and soap. Make sure to be very gentle with the seam. For an easier clean we would recommend using warm ISO. ISO can be warned up by placing a container into hot water.
Alternatively you can simmer them in coconut oil rather than soaking the tubes in alcohol.
What is the differnce between micron sizes? What one should I use?
What micron size you use all comes down to personal preference. The 25u offers a smaller hole and gives you a more filtered and refined product where as the 50u offers larger holes that allow material to pass through easier and can sometimes give you a slightly more rewarding yield. We personally find that there is not to much of a difference between them.