I always like to read what to use to pot Neps. Alla A Swenson, the author of "cultivating carnivorous plants" always recommends some LFS. As a matter of fact almost all of my Neps are in LFS only. I don't water them as much, and they are doing well. Only in my new 3 plants i am combining coconut peat with LFS. I stay away from perlite because in the long term is detrimental for Neps. Perlite absorbs minerals such as fluoride in the long term which are eventually released giving your plant a shock that you will never forget.