Day 21 since germination, added a little bit of fish mix to watering schedule, a little bit of yellowing on foliage, ph testing RO filtered water and bringing it down very slightly to 6.5, I think possibly the soil as all mix quite nutrient rich to start with so going really easy on the nutes at mo and not too concerned, if it continues or notice more will water till run off check ec of the soil just to be on safe side. Pleased with the amount of growth after 21 days :)
What ph is your input? I’m no expert but I would thought if it was to do with light all the top leaves would suffer including the auto, I would recalibrate your ph pen and maybe reset with a flush