Leaves twisting and curling. And a few patchy leaves

Yes cheers mate iv already flushed them both yesterday when was bone dry with 25 litres each, letting soak off for an hour. So just giving them a few days to see outcome of flush. My nutrient mix has been an mild/medium mix so far up to date + letting soil dryout between feeds + watering 3 days after every feed with out nutes. Cheers guys thanks for youre help so far. I know now next grow to keep a diary from beginning to end

Its only patchy on the plant with out twists mate. My other plant is very twisted mainly on the upper leaves, but got no patches at all over her

Hi mate, the downward curl is likely Nitrogen tox if not wind burn. I'd back off a little with N. Also cal mag has N in so be cautious when you add cal mag into the mix as you're already going to need to reduce N levels.