Everything is looking good, I increased the exhaust fan time to 45 minutes ever2 hours, this did help a bit.. But at times after watering I have seen as high as 90% but after the exhaust cycle it always drops in the 50-60%. The runt is doing good and catching up. Getting read to flip to flower cycle soon so I'm adding a bit more phosphorus to the food.. using Foxfarm Open Sesame.