Hey Iris, you have a great point about the heat due to light exposure! So far the room hasn't gotten above 77 and i did see the res climb up to 75 at one point but it stays around 70-73 on average. The rH is a lil low at 46 during veg but i have some water out in front of a fan to try an bring it up.. I'm hoping once i go to full power with the lights and flip to 12/12 the heat doesn't get to bad.. chillers are expensive! the one issue i am having is with ph though.. seems likes it's goin real high and i have to add a lot of down.. i'm scared of adding too much so i've been letting it go until about 6.7 before i lower it.. i'm hopin it stabilizes soon! anybody ever had a similar problem during the first few days of the clones veg? i know it normally goes up but this seems like some big jumps.. ohh well i'm probably just paranoid from smokin too much haha.. thanks for all the help guys!