Yellow spots

Yellow spots are starting to show on my leaves no pictures can't really see it in a picture what can I do to correct this before it get worse

need more info or a pic really

Maybe this will helpView attachment 2496045

first thing to do is to ph your water. in soil/promix it should be at 6.5-6.7, hydro should be 5.6-5.8. it is very important.

Rx one green sharpee