well. here is the kicker. it MAY have been a nitrogen def. i can;t really say. but i did water the other day. forgot to post. and i did notice the leafs have not yellow'd any further. and have not crept up. and it is about time to water again. so i will continue to add an additional 5ml of Pro Grow to my water regimen. so, i guess it doesn't always have to have an "even" yellowing. i went to the hydro store and they told me it sounds like nitrogen def. i told them i don't think so, and i tried upping the nutes and it worked. EITHER!! i need to start feeding sooner, or they had a def. its hard to tell. i know my water really well. and my nutes, but the medium i am using i am not so happy about it at this point and will be switching over to Roots Organic here in a few weeks. i am going to try something out. i am going to start seeds in SMA#4, and then transplant the newly sprouted seeds into the Roots. i need to see if this will stop the yellowing i keep seeing on the first and 2nd sets of leafs. i have a plant in flower right now that is acting funny. doing the same thing, but in reverse. its happening at the top. i will save that for another post. overall the plants in this set are coming back pretty good. in fact the NYCD had a bad start, its finally looking good. i started feeding it already, and this will tell me if i need to start feeding earlier or not. i think that is what i am going to have to start doing. thanks for listening. and the +rep. that is highly appreciated. thanks for hanging out and watching the progress. it should be decent. they are getting tall. i technically would start flowering them in the next few days, but my flower tent is completely full at the moment. more pics coming soon.