You do got some nute burn but also - Zn, Fe, and Mn deficiencies which is likely due to high ph you lock these out it all occurs togather - if your ph is fine however (unlikely, I think its more than just a coincidence these 3 are locked out) then you need to use a nute regime with these micronutrients present.
If you don't want to drop the money get an electronic meter then get the drops, I actually prefer drops a lot of times because I dont have to calibrate the stupid thing. If your source water is something like 7.0 then add something to your water to lower it and start giving it this mostly plain water for awhile - for example you can use molasses, super-thrive, or any really weak nute at a low dose to get it to 6.0-6.5 (preferably just any nute that you can't really overdose on, a microbial catalyst is another example and earth worm casting tea is another) - after watering with this for awhile things should mostly get back to normal, however the damage from nute burn is irreversible,