Hey! I am a newbie doing my first grow in of Big Bud and Purple Haze in DWC.
4x4x8 grow tent. I use one air cooled 500W MH light for 2 totes, 2 lights and 4 totes total. Lights are 18" from the tops. I have (4) 10 gal totes currently filled with about 7 gals of water. My tap water is about 7.2...