Magnesium or Nutrient Burn or?

Flushed as I said before with ph'd water the other day, based on the responses I plan to feed: GH FloraBloom nutrients (PK and mag) 4ml GH CALiMAGic ( Cal and MAG - obviously, and it has a small amount of N (1%)) 4ml 4 litres water pH 6.3 We will see how it goes.

Its a defiency. Ur giving not very much Nuts. I would give them More. The top Leafs look a littlebit too bright. Try giving them more N. Its normal that bottom Leafs turn yellow later on. ust remove them because they will cost the Plant energy instead of giving Energy. (Yellow Leafs have less Photosynthesis and the Plant will try to keep them and will use energy on them, so they are a waste of energy, and logically the Bottom Leafs getting less light that the top Leafs). Rest of the Plant looks really good, maybe defoliate her a little bit to get better Light Penetration to mid and bottom buds and way better ventilation. (Oxygen and CO2 is very important too for the Plant, Substrate and Roots need Oxygen and The Leafs need CO2 for Photosynthesis. And give a little bit of Nitrogen.

Hi there! To me this looks like a potassium deficiency but the clawing of the leaf tips looks like a nitrogen tox. Nitrogen toxicity causes potassium def so this could be it