The diary is lacking information and it does not look like the medium is to moist. It does look like it is just peat with no extra perlite or anything.
The leafs are a bit warped and that could indicate to much water but I am leaning towards they got to much feed as they are also crispy and over watering does not make leaves burn and get crispy. Also note the medium does not look to wet and peat on its own drains well enough and almost becomes hydrophobic at times.
I would look into getting more detailed information into your diary so we can assist you better. I would also look into getting a TDS pen to monitor your feeding concentrations in the solutions your giving them. Your diary say your growing 5 seeds all gelato #25, are all 5 seeds doing the same thing???
Take a qucj read though this article on the levels of EC/PPM to aim for as well as PH. I will open some doors for you and give insight on the subject,
growdiaries.com/journal/best-ph-ec-and-ppm-for-hydroponic-marijuana
Happy Growing!
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