Are Seachem aquarium products safe for aquaponics use? I've long used the Seachem Flourish plant nutrient line for my aquariums. It's a product line I know well and that is reliable. 

Is there any reason not to use them in an aquaponics system?  I'd much rather use a product I know, than to have to learn a whole new line of hydroponics/aquaponics nutrients, if I can.