Looks like nute burn to me BUT What kind of tap water and what is it's PPM before you add anything ?
Chlorine, chloramine burn from tap water Looks like lock out or nute burn. Flush with R/O or distilled water for a few days and stay away from tap water unless it's from a well and you know what's in it. It's better to start with nothing in the water and add only what you want.
Your ec would only be 1.2 to 1.6 and depending on the meter to covert to ppm's would be 800.
LOC NAR on probation Reviewed by LOC NAR on probation on . Help please: old growth turning brown.. These girls are Dutch passion auto blueberry and a nirvana blue mystic. Grown in pearlite using Dutch master gold one range. The ph is maintained between 5.2 and 6. They are fed daily at ec ppm 800. Flushed weekly. Please help fix my girls.290482290483 Rating: 5