For my Fertilizer (Nutes) I used Bobbies formula, I also added about 1/4 ounce of vinegar to drop the ph to around 6- 6.5
N P K
Nute Mix per 5 gallons for tomatoes (20-18-38)

• 12 grams Calcium Nitrate Fertilizer 15.5-0-0 better price here Biotech

• 12 gramsHydroponic Tomato Fertilizer 4-18-38 better price here Biotech

• 6 grams epsom salts Magnesium Sulphate
  

(N) Nitrogen (P) Phosphorus (K) potassium

That is a good all around fert for most plants. Dwhofer is currently using it in his systems and having good success with it. Formulas specificly tailored for each species of plants will yield better results but for newer hydro gardeners that has all the nutrients a plant needs to grow rapidly with no problems.

As to the nutrient having a higher set of numbers it doesnt really matter as long as the balance of each specific nutrient to the others is correct. Say a 1-1-1 fert gets used at 10 times its dosage you could call it 10-10-10 or 20 times 20-20-20.

Thanks for tacking the time to reply sqwib and chuckwagon009.

I`d shop around for a better price on calcium nitrate, $13 for 5lbs is daylight robbery.

if you have a TSC in your area they can get you calcium nitrate cheap. Ive asked the local one to carry Jack's products which have a formula very similar to masterblend but cheaper.