Before the question here is my setup:
7 clones Maui in 1" rock cubes
1 Clone Blackberry in 1" rock cube
42"x42"x6' dedicated room
18 gal rez
Top feed system 3.5" nets with hydroton medium
400w HPS located 18" from tops
6" fan stirring room air
168 cfm intake leaving room
168 cfm exhaust...
