To me needs some calmag mines had a yellow tint to them I’m at 6 g per gal I upped it a bit problem fixed but ur at a high feeding at 6.6 so I wouldn’t recommend to go higher to fix problem I would give a good flush Incase of nute lockup n add some calmag n wait a few days an see if that helps but I usally stay around 6 grams thru all flower but that’s me keeping it on the safe side