Organic soil probs (pics) need help

Ill attach some pics of the plants that this is happening to. Most are clones and i think its only happening to one thats a seedling. they are getting a little yellow and almost brownish around the edges. Im using LCs soiless mix #1. 5 parts peat moss, 2 parts mushroom compost, 3 parts perlite, lime, bone meal, blood meal, and kelp meal. I let the mix cook for almost a month. The PH seems to b ok from what i read on here. It reads around 6.5 or so. I've only givin them water. No extra nutes. The temp in the closet is about 82-86 F. Dont know the humidity. Plenty of air movement. They are growin like crazy but just some discoloration and its not happening to all of them. Ok heres the pics. Any input or anything will b greatly appreciated. Oh yea, i added a lil epsom salt to them thinkin that might b it but hasnt helped. Thank you to anyone that takes time out to help

One of those plants (I think 5) looks similar to this: http://growweedeasy.com/sites/growweedeasy.com/files/potassium-deficiency2.jpg

So i need to add more potassium? What could i use organic to add potassium pretty fast? Thank u for ur input.

Those plants look too young to have any fertilizer at all on them. I would not put plants in a soil like that until they were at least a month old. imo that is nute burn! i would put a gallon of clear water through each of those cups asap to flush throughly. Its gonna take a couple a weeks for them plants to rebound . When they do start a very light fertilizer program until u learn your plants. good luck

also, forget about potassium

Ok thx. I have been just giving them plain water every since they were born. Your saying the organic nutes in the mix is to much so soon? Should i get a soil that doesnt have anything in it and then transplant them to the mix after a few weeks? +R for the help. Thanks alot

It seems to have started from the bottom, as that is where most of the damage has been done...this tells me that it is most likely a deficiency, not an over-dose...try adding some organic grow nutes to your watering schedule...the damage is done and will not go away, but the new growth should look normal...

SLB

This is the problem with super soils. You add all these ingredients to a soil and then some time down the road there is a problem and it becomes difficult to diagnose cause you do not know what remains in the soil. This is especially true for young seedlings and cuttings. IMO the best way for an inexperienced grower (less than 4 similar grows) to cultivate MJ is to follow a simple feed schedule. feed every watering 50% the recommended dose. After a grow or two you will get the hang of it. It's like riding a bike. d:^)