Also my youngest blue mystic leaves are still yellowing
Ok i will give you couple of advices not that i am an expert of anything but this is just common sense.
1- Your light is good for 1 plant maybe just maybe 2. Thats all. Don’t plant this much seeds or you will get what you have. Small airy buds with stretched plants.
2- Your yellowing leaves are all deficiencies. Yellow ones are nitrogen deficiencies, others are probably potassium tho you are feeding molasses i don’t think you are supplementing with aacts, molasses works very good if you have an active soil life, which you probably don’t and if you are not supplementing aacts i would advise against molasses, as too much sugar in the soil will mess ph and will cause bacterial blooms which can easily lead to root rot as it is fairly anaerobic in soil.
3- Some of the plants look overwatered, thats because you are using that plastic bucket but there is nothing to do about it, just make sure the soil drys top two inches before watering.
4- I haven’t catch if you are phing your water or not, but do so at 6.8.
5- If you want to grow more than 2 plants you will need much better lights and a bigger space and you have to keep lights close to keep the stretch down. Also some good training could have gotten you more from 2 plants than all these.
6- Is your grow are isolated meaning no light leaks?