in my first grow in coco, after some nutrient problem , i decided to flush 4 of my plants. I used plain water ph 5.8. Next day i feed them with Canna A&B , ph 5.8 , ec 900.After 3 days i take some coco sample and tested(video from Canna). Ph was 5.9-6.0 and ec 340 !!. i did it again - same...