Weird growth and coulor

Take a look and let me know what Is going wrong here.
Need any info just ask
Thanks

1st two possibilities are over watering and or bad quality soil.
People are going to need more info like:

This is a paste, the questions are not specific to your situation.
The more information you give the better the help you will get.

What medium?
How often do you water and how much water do you use?
What nutrients are used and how often?

What temps and humidity?
Do you have fans for air circulation?
Stuff like that and other info will help.

Medium- plant magic supreme plus
Watering- every 2nd day roughly 300ml I wait till the weight of the pot feels light.
Nutrients- plant magic oldtimer grow 1ml per litre only once last week
This week raw b-vitamin in plain water ph 6.8
Temp- 19-29c rh%40-70
2 6" fans 1 turned off. And a small heater to keep the temps up.
600w duel spectrum lamp
6l super roots air pots
Exhaust fan with filter creats more than enough fresh air as well.

Cheesecakes said:

Exhaust fan with filter creats more than enough fresh air as well.

Click to expand...

You still need to circulate the air in the grow space especially if you have a heater in there. You want the plants to move slightly. I have not seen a set up where an extractor properly circulates air.
Might not be relevant to your problem now but it will stop further problems down the road.

Yes they are moving. There is 2 fans 1 high 1 low.