My first grow

Two of my plants are looking good, though they seem to be growing a little slowly (or I'm just expecting too much). Looks like I need to adjust my ph down a little in the water. I started these girls in ffof, and one of them seems to be having issues with the "hot" soil. Will avoid starting in for in the future. Will continue just water for now until I see some signs that nutes are needed. Hoping the one with burn bounces back!