i'm noticing something with my plants. I'm seeing that the new growth on my plants is kinda yellow and not green and some look varigated with darker green in the center of the leaves and the yellow on the outside. also some of the leaves look rather thin like they have parts that are almsot like melting but not realy melting. i'll try to post pics of it but i was wondering, does anyone know what is possibly causeing this? i've read this could be a lack of potasium. does that sound right to anyone?