Serious Plant Problem

Hello everyone that reads this and i hope someone can help me before its too late.

I am growing in a coco, perlite, worm casting, potting soil mix, compost, bone meal, azomite dust or rock, rock phosphate and dolomite lime mix. Now i have not added any nutrients to this mix only water. Im freaking out because my plants are basically dying and im thinking of saving them by scrapping the whole soil, organic thing and dransplanting them to a DWC system. My mate took 6 of my plants off my hands and did exactly that and said they went green again and grew new perfect leaves 5 7 9 blades in a week and a half of doing that. I have also flushed the pots with epsom salts the normal dose 1tbs to 5 litres water

This means i would have to go out and buy all the stuff so thats a bit pricey. anyone that can help please. Some leaves are going purple as you can see in one of the pics

Thank you to all who take the time to read this

so i think i mights have uploaded the same pic a few times. o well just in case you didnt see it the first time hahaha

well, they appear to be locked out. Over-fertilized, burnt, and probably ph problems. Buy miracle grow and a disease/fungal spray, and PH the solution perfectly.

What is the soil/media?
What are you feeding with and how much and how often? List EVERYTHING!
What is the water?
Under what lighting?
What strains?

You have to try again I'm afraid, you won't get much off of those. It's your soil mix. Did you test the PH of it?

You should be able to salvage those plants by removing them from that mix and re-veg them in something else.

Copy your friends system maybe? I just use peat & perlite myself.