First Grow, with 2 different seeds

Day one of week 7, full water/nutrients change to 45% of the past weeks concentration. For the most part I'm making them run horizontal but not tying back any branches. Light intensity is increased more from last week and I will increase the light more in 4 days. I know most plants can adapt in a few days. The humidity has been up to 61% because I was not here to monitor it. it will be remedied today. Day 7 week 7, oh shit! Fungus attack. Cannabis Leaf Septoria. I've been studying a course on the Soil Food Web which has occupied my attention almost 100%. Plus a over demanding job (most days were 14 to 15 hours) that I finally had to leave. I totally missed the signs of this infection. I woke up today to a yellow/brown spotted leaf staring me in the face this morning when I opened the grow room door. Looked up the type fungus and what caused the infection and more importantly what can I do to remedy this with the least amount of damage to the grow. I gloved up and sterilized my trim scissors and removed all the infected leafs I could find. Most were low hidden early leafs that I quickly took and discarded them outside in the trash can. After a short break to let my eyes refocus, I found many lightly infected leafs. I removed them. The majority were under the top foliage toward the bottom. I redirected my oscillating fan to give better air movement to the plant on the left that had the majority of the infection. I could only find 3 leafs on the right side plant that had spotting.