Here are some pics
@Killaki @King Dude @CaliRootz88 i have some organic medium mixed with cocoa and worm castings
It looks to me like a copper deficiency caused by a pH problem at the root zone. If I had to guess why this would happen, it may or may not of had something to do with the acidity of your fungicide running down to the soil. You can check the soil pH if you have the ability.
To correct this suspected copper deficiency, I recommend flushing the soil with pH neutral water (such as distilled water). The plants should make a good recovery if any pH problem is corrected, as they would be able to absorb copper better between 6 and 7.
Rather than using your fungicide, you could try up to a 1:1 ratio of 3% hydrogen peroxide and distilled water. Use the highest concentration only once a week, or use a lower concentration multiple times per week.