Utopia Haze - Barneys Farm

Looked up your lights PPFD Map and figured out. For 18h of light for seedling you need 200-300umol. On your map thats 24-30inches away from the light. I'd stick it around 24-27. (Also, with your light Id do 12 inches for both veg and flowering. Its not the strongest light but will do 1 plant with pretty consistent results on the whole canopy) Good luck!

You use calibration solution or two different EC/TDS. Ie you test/calibrate with a 700ppm then you test/calibrate with a 1000 ppm solution.. Then you recheck your readings with your calibration solutions to see how accurate your pens are.. Here's a link to a company that sells the calibration solution. Cheap or Expensive all TDS/EC meters need to be calibrated once a month or so. :http://hmdigital.com/product-category/accessories/calibration_buffers_storage/

Once you top the plant let the new growth shoots grow to about 2.5-5cm/1-2inches long then start tying them down to spread the growth and increase light exposure! I'd also suggest lowering your "FloraGro" dosage to about 0.8-1ml/l and to stop adding the CALiMAGic additive completely for now. Seems like your plant is suffering from Nitrogen (N) abundance (which is why the foliage is dark green with tip chlorosis) and Calcium (Ca) toxicity (lower leaves clawing downwards with some blotching). Calcium is a micro-nutrient which is only needed in small amounts and sometimes doesn't even need to be added during the whole growth! Only add Calcium when the plant shows deficiencies! Hope this helps! Good luck and happy growing :)

The deficiencys showing are likely from ph locking out nutrition when it fell. If they progress more then you have a issue. Looks like potassium and cal mag. Is why I say it's from the ph drop. Good luck and happy growing 🌲🌲🌲👊

Looks like you have a potassium deficiency or lockout, this causes the edges of leaves to appear burned like the ones in your photos.