Start of a problem? Nutrient burn?

Indoors
temp around 25-26oC
In Mapito
24/0 Cool white florescent's 3inches from plants
Fan on
Plants one month old from seed
PH usually about 6
Humidity around 50%
EC = 8, started feeding a few days ago
Wilma drip system, have it on for 3 hours spread over the day and night

Noticed the tip of only a couple of leaves that something is going on. Is this the start of nutrient burn? Any advice would help

First of all, goods looking plants. It takes a close eye to see what you have pointed out, but that is what keeps a crop from going under. Your temps and humidity are fine, the ph is a little high (needs to be around 5.5 for hydro, and with rockwool you can let it get even lower, but 6 is higher than what it needs to be). That leaves me with ec. I'm not trying to knit-pick, but is your ec 8 or 0.8? I use ppm and my conversion chart shows that 0.8 ec is about 56o ppm, which is right on the money for where the plants are. If the ec is 8, you are looking at around 5600 ppm, which would have a devestating on the plants. In short, your nutes are probably ok (they look like it) but the ph needs to be lower. Hope everything goes well for you!

there fine just a lil over on the nutes good and healthy dont worry about it and ph a lil high

Thanks Guys. Yes I guess its 0.8. Pic attached of my TDS meter. Ive lowered the PH down to 5.6 now, I'll drop it a bit more tomorrow. thanks for the help!