little seedling looks sick. I'm not sure if you can tell in the picture but the little leaves are kind of folding over. I'm using a topfeed/DWC hydroponic cab. I'm using a 180 watt UFO LED light that is running on a 20/4 light schedule. My pH level is staying pretty consistent at 6 and my PPM stays at around 61-65. although I added some nutrients so now its up to 91. the temp stays between 79 and 85F and my RH is at around 45. any advice or ideas?
There may be a few things things to check out. The first thing I would look at is overwatering. I've done it several times, when you over water the plants tend to droop which looks like what's going on here. I would cut down the watering cycle and see if it improves. Also, what temp is your res at? Try to keep it <70F for the best results or you're inviting all types of root rots and nasty shit. BTW, is that a mini cool cab from Sunlight Sheds?
I to have a 180 watt light this happened to my super lemon haze if its droopy you might be giving to much water since its a seedling maybe to much nutes if its its cuping downwards the leaf then its too much nutes and also some plants arnt very good under led. I would give it just phed water but dont flush if its a sativa 5.9-6.0 ph is good if its an indica 5.7-5.8 but just plain water no nutes ph 5.5-5.6. drop the light also 18/6 so it can get healtheir.
Others are more experienced than me but I would agree on changing the light schedule to 18-6 and monitor your watering amounts