yellow and brownish spots on leafs

here are some pic of my plants and the main two pics of the leaves in question can someone tell me what the trouble is? i found this today and when i did the soil was bone dry as well i didnt realize they were drinking so much water the ph after i flushed today to be safe was 5.3 on the first drain pretty low i know so i added 6.5 ph water. no nutes for now.until i find out whats up please some ehlp or feed back..thanks peace pot prosperity

whats your ph?

Looks like Magnesium. I had the same issues.
I've added Epsom salt to a my watering.

my ph now that i flushed and rewatered it with a higher ph is around 6.0 im slowly trying to get it back up to about 6.3 and also jc how much epson salt per gallon? ty in advance..ppp my bad and what causes mag to do this?

stinkbudd1 said:

my ph now that i flushed and rewatered it with a higher ph is around 6.0 im slowly trying to get it back up to about 6.3 and also jc how much epson salt per gallon? ty in advance..ppp my bad and what causes mag to do this?

Click to expand...

I use one teaspoon / gallon for Mag.
I dont know what causes this deficiency
I just know when it gets worse your fan leaves dry up really crispy

hey thanks man really appreciate the feed back for all the growers on here you would be suprised how long it takes to get any help...lol so this is what im going to do tommorow morn im going to water again because they are drinking a lot now and ill add the epson salt no nutes but im also going to be going to 12/12 saturday so i am going to do 24 hours of darkness first in the morning..start bloom and micro nutes on next watering... illl be posting pics in my grow journal tommorow before switch...peace pot prosperity...