Leaves keep turning brown and yellow

PH....WHEN I FEED MY PLANTS I PUT IT JUST LIKE .2 LOWER THAN WHAT PH I AM GOING FOR BECAUSE IN 24 HOURS IT WILL RIZE UP FAST, THEN SEEMS TO LEVEL BACK OUT ON ITS OWN, IF I PH RIGHT AT A PERFECT PH THEN IT GOES HIGH FOR ME

(PLEASE READ THIS) (I CAN SAVE YOUR PLANT 100% GARENTEE) Your soil ph is to low 100% the fox is super simple take the plant to the bathtub if possible I assume your tap water is between 7 and 8.5 or so correct? Run like 10 gallons of regular tap water thru the soil right b4 lights out. Then mix up 1 gallon with nutrients use whatever flowering/booom nutrient you have don’t mix up a super dose or anything just whatever the bottle says as a recommendation for 1gallon. (How ever many ml per gallon of nutrients you put in the water add the same ml per gallon of ph up to the water) I don’t know how many plants you have but then give each plant 1/2 gallon of the mixture I just described above.

looks like a potassium or phosphorus deficiency. i keep telling everyone this but alot of the time its your water source. people dont think about the chlorine toxicity and it looks similiar to a calcium ir magnesium deficiency. i personally have to boil my water because of the chloramine in it. its harder to get rid of than chlorine. but ever since i started growimg again, ive done this and ive had less leaf necrosis.