what strength nutrients should i use?

i have an emilys garden http://www.planetnatural.com/site/emily-s-garden-hydroponic.html and i have 3 blueberry x sweet tooth seedlings in it it comes with general hydro nutrients. it has a 2 gallon reservoir so im wondering what strength solution to use im at 1/4 tsp of all my nutes which is the seedling reccommendation. ph is 5.5 -6.0 any suggestions
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