The free sample of Platinium nutrient look to be expired, crystallization of potassium.
It can be the source of K deficiency.
Dumping the "Grow" bottle, starting the bloom nutrients a little bit early to maintain the EC.
Unfortunately the "Bloom" bottle is crystallized to, now I use a mix of Platinium & Plagron to preserve the nutrition needed by the plants.
Why don't buy new bottles ? Because the next run will be full hydroponic, currently I'm just finishing the soil/coco nutrients.