Watering Help

Ok so i got my seeds to sprout in 1" rockwool cubes and transplanted them into 4" rockwool cubes. I kind of following the Mr. Green grow room guide but i do not have drippers so i am going to hand water them. In the Mr Green vids he does not specify how much nutrient water he used only said he waters 3 time per day. So im just wonder what my just approach to water here is? Any feed back would be great thanks.
 
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