All of my plants have started to burn yellow in co...

hey there, that's nutrient excess as you can see from the burnt leaf tips, i dont see any nitrogen deficiency (yellowing starting on the bottom leafs first starting at the base of the leaf going outwards) or nitrogen lock out, same thing but the leafs sometimes get "too green" and a bit shiny. Try to feed only every third watering from now on, meaning water water feed water water feed, should work out in the end. Hope this helps ! 🚀

what many people often do is to switch to bloom-nutes directly when switching to bloom, which i would not recommend. don't forget that at the beginning of bloom she still needs to go through the stretching phase, where she requires a lot of nitrogen for the growth.. i would in general suggest to only start using bloom once the stretching phase has been completed and she's starting to build the buds.. happy growing!

Hello.. Hope you are well.. It shudnt b to much nitrogen in soil and from looks of pics it looks more like she needs nitrogen abit tbh.. After looking at ur stats i can see ur feeding her solution at 24°c..maybe try dropping this o around 18-20c n watch for any improvement (give her a few days).. Stay safe n gud luck with her.. 👍🍀

Its time to stop the Fish Mix IIRC, dont think its supposed to be used during flower. Looks to me like nitrogen so I would just end the Fish Mix and see what happens.