Brown spots on fan leaves

So this is my second grow. My medium is happy frog do farm soil. Growing in a five gallon pot. I water about every other day or two. I use grow big by fox farm every other feeding. Three teaspoons per gallon. Right now I’m feeding a little over half gallon at a time. These spots have really only showed up on large old fan leaves. I have noticed some twisting in some leaves. The seeds are blue whale I got for free at a convention in Virginia. I can’t tell what is going on. They’re almost a month into veg. Any advice would be great!

Looks like overwatering. Try waiting to water/feed until the pot is light. If you need to, fill up another 5 gal bag with your media then check the weight of your plant against the dry pot. It needs a wet/dry cycle. Once you correct that, the new growth should normalize.