Help! My seedlings look unwell!

Hi all,
I have a few seedlings that look pretty unwell...they are day 13 from seed, under a 2x 55w T5 (previously about 3" from the top, I have raised the light to 8") Temps are about 77c, 45% humidity.

Some of them have black tips.

I'm pretty sure they were okay up until transplant a few days ago, as they were outgrowing their root riots. Could this be transplant stress?

Before that, I was feeding them a weak solution of Biobizz Root Juice and Nitrozyme. They seemed to be fine with this for about a week while they were in the root riot cubes. Since the transplant I have only been using tap water that has been sitting in a dark cupboard for a couple of days.

Plants were moved into Biobizz all-mix soil. Any help would be appreciated! Thanks.

Aye up mate, do yo mean 77Celsius = 170.6Fahrenheit?? Bio Bizz All-Mix supposed to be Ok? IDK I've been recycling My Organic Soil Mix for over a year and never got round to getting some All-Mix, Though I do use Bio Bizz Grow/Bloom/Alg-A-Mic/Heaven/TopMax...
The one thing I was just thinking is did You pre-wet(activate the soil) By this I mean I think(Bear with Me, a bit Baked!!) nearly all Compost Soil Mixes have add Nutes, and from what I read, some Peeps tend to water the Soil mix in a pot/tub and let stand...You see as soon as water is added to the *New Soil/Compost the FERTS added are released, So IF You didn't do that...then maybe that's given your little ladies one helluva NUTE BOOST...

Hope You manage to sort.

Peace

don't feed seedlings.....this is what results

Sorry I meant 77F, so 25 degrees Celsius.

So basically they are suffering nute burn? I am just using water at the moment - yes the soil was moist (used a light sprayer) before the transplant. I will continue to flush it through with just water and see how it goes. Thanks for the replies.