First diary Fuel D.og, W W, Pineapple Ex

So week 7 in 12/12. With the Fuel D.og, I've had an issue with a potassium deficiency. At first I thought it was a phosphorus deficiency because I was slowly reducing potassium monophosphate. So I started to give more for a few day but the yellowing of the leaves continue. Few days after I figured out my mistake and proceed to a flush for a day to remove excess of phosphorus. I've drop the pH solution to 5.8 and I started giving Potassium Sulphate 0-0-52 in reasonable amount. I'm watching for recovery but damage have been done to bigger older leaves which I don't think they will fully recover. The White Widow was not affected by the defiency at all. The Pineapple Express were having a manganese deficiency which never occurred to me before. I search online and I found out it was because my feeding solution had a too high pH so I lowered the pH to 5.7 this should resolve the problem.