well without sounding like a dick LOL its just ,my opinion so please keep that in mind when reading this post,but my Bias is based upon a sound and VEEERY simple principle of water. chems and Ions,its just a simple fact that when using those bottled feeds in water culture(unless your filtering and reusing ALL) kills the environment ,then there is filter disposal as well. the quality lacks massively , i know Ii have done chems several times. and almost feel sad to say that too,but thats how it is,its skewing of the market and the public for money .thats it,solely. i promise you that. but since these again are my opinions take nothing from this thatn, its all about the environment and peoples well being,that simplistic for me.