No Nitrates??

[artw]

you guys might want to check out this

http://www.csd.net/~cgadd/aqua/art_plant_aquacalc.htm

and this

http://www.csd.net/~cgadd/aqua/art_plant_dosage_calc.htm

and yea you can get all of those powders and stuff at UV on Antares. they have saltwater aquariums there too for your viewing pleasure
and K2SO4 will cause you to sneeze if you inhale it through your nose