The brand Fleet vs. the store generic don't come in the same concentrations (though the same active ingredients). I believe it was like fleet 7.2g monobasic NaPhos, 2.7g dibasic NaPhos; generic 2.7g monobasic NaPhos, 0.9g dibasic NaPhos). Does this matter when it comes to colonoscopy exams? I hope it did because I shelled out an extra $5 to get the Fleet ones for my dad's colonoscopy exam when I could've purchased 2 for less than the price of 1 Fleet! : If it does matter and say patients would like to purchase the store generic, how should they use it differently?