Purps OG, Wi-Fi OG and OG kush in 1 room

Again i found some strange marks on my plants wich i can't explain so i asked my buddy that is working for Aptus if he can have a closer look for me. Where i was thinking i thinking that i had some defiency he thinks that i have a lockout because of to much salts in my medium. at the end of the week i made some bottom samples and he was totally right about that! My runoff EC/PH are also very different from wich goes in... The first day of next week i will remove all the leaves to try a new technique to me (schwazzing)