I have an EVO 13.5 that just bought an Intank Media basket for chamber1 and I am not sure what media to put in it. Chamber 1 top section is going to be floss but am not sure what to put in the middle or bottom sections. Carbon? Chemi pure blue, other media? Chamber 2 has a lot of bio balls and the third chamber has my upgraded return pump and heater. What are people using for their middle and bottom sections in chamber 1?