First and foremost... I like to say Hello to all I'm brand new to this forum tho I singed up a year ago and it's my first thread. I'm a member with SD and I hear a lot from different members regarding this forum. I like to start with help from u I have a 125gl 2 AC110 2 jńger heaters 300watts each my substrate is sand...with 6 Discus all around 5" , 4 clown loaches, 2 gouramis and Plants 3 small Amazon swords I like to have a few more something nice to look at I read that having a flourite as a substrate will help in the growth of plants and Co2 but I want to stay away from Co2,now can I split my substrate where I have my sand upfront and flourite in the back??? I realy want nice plants but need ur insight.