Your seedlings are too small for nutrients, I would hold off on nutrients until your plants are 4-5 inches tall and have 5 nodes of growth then start with 1/4 strength nutrients. Does your nutrient company have a recommendation for seedlings?
here are the directions of use for your nutrients, from their website.
Coco A & B Directions of Use:
A ready to use fertilizer solution is made by diluting A & B concentrates in equal amounts with tap water.
Shake Coco A and Coco B well before use
Fill the nutrition tank with water
Dosage: 40 ml / 10 Liter - 15 ml / US gallon (1:250)
Stir well and let mixture stand for some hours
Recommended pH: 5.5 - 6.2
Recommended EC for Coco A + B is 0.8 - 1.8 mS/cm (Part A plus Part B and assuming source water at 0.0 EC)
Plants best catch roots in the Coco medium when it is not too wet
Other directions
Never mix the A-concentrate directly with the B-concentrate, as insoluble combinations will occur
Keep out of reach of children
Store in a dark place
Keep away from extremes of hot and cold
Over fertilization has a negative effect on the nutrient mix and plant quality
Not to be used in protected nature reserves, reed beds or swampy areas, in hedges or small woods, in bodies of surface waters or near groundwater collecting areas
If the solution comes in contact with the skin or eyes, rinse with water.
here are the directions of use for your nutrients, from their website.
Coco A & B Directions of Use:
A ready to use fertilizer solution is made by diluting A & B concentrates in equal amounts with tap water.
Shake Coco A and Coco B well before use
Fill the nutrition tank with water
Dosage: 40 ml / 10 Liter - 15 ml / US gallon (1:250)
Stir well and let mixture stand for some hours
Recommended pH: 5.5 - 6.2
Recommended EC for Coco A + B is 0.8 - 1.8 mS/cm (Part A plus Part B and assuming source water at 0.0 EC)
Plants best catch roots in the Coco medium when it is not too wet
Other directions
Never mix the A-concentrate directly with the B-concentrate, as insoluble combinations will occur
Keep out of reach of children
Store in a dark place
Keep away from extremes of hot and cold
Over fertilization has a negative effect on the nutrient mix and plant quality
Not to be used in protected nature reserves, reed beds or swampy areas, in hedges or small woods, in bodies of surface waters or near groundwater collecting areas
If the solution comes in contact with the skin or eyes, rinse with water.