Thanks im using a Wilma big 4 in 1.2 x 1.2 x2.0 tent 400 w HPs aircooled hood with 6" extractor no iintake fan temps are 20 deg lights on drops to 17 18 on a night res temp 18 -20 deg, using canna aqua a b feeding every 3 hours for 1/2 an hour ph stable at 6.0 ec 177 /175 I'll take some more pics just before lights come on thanks for your replys