And we have a winner! Those pics tell a good tale...
Your leaf edges are curling up slightly. While the plants are very healthy, you are running a bit warm close to the light. The fan will help a LOT but that is a symptom of mild heat stress often combined with arid conditions. The damaged leaves beneath won't heal, but if the problem has not progressed, you can be reasonably assured that you now have a handle on it.
With that runoff, salting shouldn't be your main problem then. Good.
What is the source of your tap water (well, city, other)?
Those plants look excellent to me. You perfectionists, lol.
stinkyattic Reviewed by stinkyattic on . Leaf problem Hello, all smokers and tokers bit of a leaf problem indoor hydroponic coco medium dripper system tap water water ph 5.7 Rating: 5