After my recent trip to a couple of hydroponic shops I noticed there were tons of attitives available for use in addition to the standard nutrients I'm using. I'm using the three part "flora series" from general hydroponics. My question is are any of these additional nutrients necessary or even beneficial or are they merely there to make more money? And I was also wondering if there was anything additional that I should be adding to my nutrient solution to gear it more towards the needs of peppers instead of say...cannabis?...