Please help before it gets worse

Hey guys i watered my plants yesterday i believe a little not a lot of water...their about a week into flowering but one of my plants leaves has been lookin weird for the last couple days..soil is fox farm happy frog..the ph of the water i used was prolly a little high about 8.5 idk...i just dont want it gettin any worse as the rest of my plants are doing great! Please help me..Thanks!

anyone??????????

Better get a ph meter.

keep the ph at 6.5 (easy fix)
if only one is looking odd perhaps its that plant?
If it's not falling apart and all yellow.. dont worry it's a fan leaf.

Def get a ph meter, 8.5 is a bit too alkaline for mj.

or use r/o water supplemented with cal/mag. it looks like a cal/mag deficiency. could be ph that is locking out the cal/mag but the soil is a good ph buffer normally. i would try to add some cal mag

whats an organic ph up and down

Where can i get some cal mag and how much per gallon

is that Diatamacious Earth on your soil, do you have insect problems? maybe its just left over damage from mites or something

Its playsand lol im using it because gnats are getting in my soil and the larva fucked up my last crop slowed down the growth a lot...

Where can i get some cal mag?

Your local hydro store or the internet.....Basically, anywhere.