Temps are good so it must be from the light. Leaf margins shouldn't be rippled like that.
Middle pic has some N tox. leaf curl. Have you checked the underside of leaves for pests?
I don't see any obvious pest damage, but you never know.
Yeah i think its a combination of things. This is my first grow, i had a SF4000 and stuggled like hell with heat at the first 3 weeks. I then changed ti the HLG and its a game changer, no more heat issues, RH is dialled in and manged by inkbird controller along with my controller on the tent adjusting the inlet and outlet fans for temp. I am actually really chuffed with the setup now but wonder if these are stressed from the jounrey so far along with my wanting to crank up the Watts to get fat buds!!
I thin the N tox leaf curl was a result of the seaweed feed. My soil doesnt need feeds but i didnt read that until after. i got excited and wanted to feed them.
That said im not experienced. would the leaf curl still be there given that seaweed feed was 3 weeks ago.
There is a chance that the soil is too much for the strain of cannabis. Aparently that could be an issue. I guess you have less control of the nutes so you have to hope the plant likes whats on offer.