IgorsLAB published Slime in the tubes including a long-term test
A quote from the article:
No, it is not a contradiction, but transparent plastic tube (usually PVC) is cheap to buy, but really expensive in follow-up costs. Ttube who can, prefer to go for hard tubing or such nice things as EPDM or Teflon, but there are also situations where you end up torn as to what it should be.Slime in the tubes including a long-term test