Most of AN's flowering synthetics are a solution made from the same few salts just in different ratios and re-branded (as are most commercial synthetic brands).
Go on ebay and buy yourself a bottle of Mono-Potassium Phosphate and Potassium Sulphate and use accordingly.
You'll save a shit load of cash and the tubs of salt will last ages and you'll get better results.
You can go on AN's website and compare all the guaranteed analysis labels they list on their site to prove the point.
Or better still use the Canna Mono range, each element available in a separate solution.
A custom regime tailored to the plant is the professional choice.