First grow from seeds

Hello, this is my first grow from seeds. The strain is Trainwreck. I started them in Jiffy 42mm discs. Everything was going good from germination through the first week. I'm using FFOF 70% and 30% sphagnum peat moss. I dont know what the NPK is of FFOF and neither does FF as i called them and asked. My tap water is only 125 ppm, I also used bottled spring water with about the same ppm. I used 1/2 strength FF Big Bloom with only a 2-3 drops. Lighting is T5 6500k HO bulbs. 2000 lumens each. I messed around by adding a 50 watt full spectrum led grow light. The water's pH I'm using is adjusted from 6.8 to 5.8-6.2

Probably a little early for ocean forest. That stuff is pretty hot. If you're into bagged stuff I would have stuck to some seed starter potting mix till I transplanted to bigger containers. Then bring on the fox farm soil.

At that age and size, honestly using FF they don't need any nutes. The yellow/brown tips in the pics looks like nitrogen burns. Let them grow out a bit before adding any more nutes. At that size, and with that much damage, I'd go ahead and do a flush with just ph'd water. I'm new, I don't know a lot, but from what I've read and experienced thus far, less is more, with nutes. I'm a week or two until my first harvest, and I'm still diluting my nutrients lower and lower.

I wanted to use FF back when I started, but didn't because I'm broke. And from what I read they either don't add any nutes, or at least not while vegging, using FFOF.

Your light is good though, my first two were some stretchy springy looking things because I had a single LED 'grow' light bulb.