hi dude ! you do not give any information about your nutrient program...but more than that the Colorimetry of your photos makes it difficult to pronounce...but if you added a lot of Co2 u have to increase your ppm to the limit buddy !
may be that there are other variables but with the few elements I would say a N deficiency close to the last stageβ¦. it will be easier to analyse with a better photo and some info π
π namastΓ©