Hi guys, i'm a long time lurker here, think this is my first post though. I'm on my first grow, i plan to do a grow-diary but havent uploaded it yet. Right now though i seem to have a problem. The majority of my new growth is small and curly, and a couple of plants are all curled down. Day 17 from seed, under 400W HPS with extraction fan and 2nd fan blowing over the canopy. Bagseed. Humidity ranges from 20 to 50. Temperature (at leaf level) is 80-85 with lights on, 60 with lights off. Planted in local organic soil, watered only when first 2 inches is dry. I have a bottle of Biobuzz (8-2-6) which I have used twice at a 1/4 of recommended dose. Once 4 days ago, once 10 days ago (I realised this was too early to need nutes). The bottle of nutes is over a year old, and was open previously but closed and stored in the dark - could this be the problem? They get fresh air, they were re-potted a week ago, and LST'ed 4 days ago. The first pics are from 4 days ago (before LST) and start to show the problem. The pics from today are at the bottom - the problem is getting worse and spreading. A couple of plants seem fine, but the majority are growing small curly (down) leaves that don't look as healthy as last week. Any advice?