Quick One First Grow

A bit worried about first one. A bit of leaf burn. A piece is missing and the other leaf has a burnt tip. What could it be? Nutrients too soon? Very hard water? Not enough or too much breeze? **Day 14 update** They live. Joyous. To be clear this is 14 days after laying the seeds into kitchen roll moistened with distilled water. I had the LED at 45cm but lowered it to 25cm and I'm sure it's stopped them stretching. Gradually increasing watering. Every other day they're getting 160ml each. Just watering near the stem to avoid drowning them. I think they're going to need more of everything in the coming weeks. Some extra info on my setup. To keep the noise down I'm using 2 PC fans until the smell comes. Powered by 2 variable dc wallwarts. I used camping mat to make holders/tubes for them in the toggle holes. Mars Hydro 300 is working solidly for 24/7. I've got a Vander 150w to add, although I'm not sure about it as it's got no heatsink on the led panel. Had to replace the fan as on the Mars with a silent wings because it sounded like an aircraft. You can see the wet tea towel in the other pot tray keeping the humidity up. The intake fan blows on this. I've got a carbon filter built in now with a bathroom extractor fan and a homemade muffler which I'll show when the time comes. HAPPY!