Here is my story.... Newbie with a first time grow. Purchased fem autoflower seeds and set up a 2*4 growlab, aircooled 400 watt MH running 20/4 with ebb/flow hydro system.... Germed the seeds then moved them to a hothouse in rockwool to start seed sprout. They were moved into tent about 4/5 days ago with smallest amounts of nutrients as they are still seedlings. Temp/humidity/ph have all been perfect, used a tds meter today for first time and was running 713ppm but not sure what that number should be at a perfect state. So to end the day today i added the final gallon with the remaining nutrients to start veg state... Went to check on them about 10 mins ago and noticed the end of the leaves on a couple are turning yellowish/brown and one has the first set of full leaves completly drooped... Any ideas???? All replies will be greatly apprecited... Thanks Again!