everyone says it’s a ph problem but i always adjust my water to 6.5 .... first 6 not in solo cups are over 2months old kept yellowing n drying up couldn’t throw them out started new batch and the same thing could there be a some disease in my tent spreading from the original 6 I started. growing in promix soil with mycorrhizae had no problems first grow 1000w full spectrum led....post pics soon