First Grow DWC Bubbler

Hello all, i'm starting my first grow this week with seeds from attitude and was hoping to get some input from people much more experienced than I. So far i have just the germinated the seeds in rockwool in 5.8 ph water. The water reads right at 7.2 after soaking in the rockwool overnight. I have the seeds on a warming mat as well and the moisture inside is very high. The pictures below show the plants 72 hours after inserting into rockwool. The white bar is a temp gauge that has been holding steady at 83 degrees Fahrenheit. Maybe a bit warm? My concern at this point is that the seedlings look to be a little brown/weak. Not sure if this is normal or indicative of some over/under water or ph balance not being quite right. any help is most appreciated.

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Also, as for the labels, I have 19 seeds total. 13 Pure afghan, and singles of the folowing: Skunk #1, Jamaican Dream, Blue Lemon Thai, Monster, TNT Kush and Critical MAss 33.