I use Turface and have used it for about 4 years now. I mix it with my medium natural flint gravel. I have found that from my experience it should not be used greater than a 2 parts natural gravel to 1 part Turface mix (2:1). Anything more than that then you may run into problems with getting plants initially rooted (Turface is lighter in weight than gravel). Also, watch out for phosphates. Turface is not a "controlled" substrate so you may not know what is in there until you start testing your water. I have run into issues with high phosphate readings after using Turface. I use it in all 4 of my tanks (20, 40, 120, & 125). Aaron Aaron's Web Site- www.jeezman.com ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/