Most of us will recommend dry chemicals, which have no brand names. They are just agricultural grade chemicals. Potassium Nitrate, KNO3, Mono Potassium Phosphate, KH2PO4, and either Plantex CSM+B (trace elements) or Miller's Microplex (trace elements), or Seachem Flourish Comprehensive (trace element mix). If your water is somewhat soft, or if your water supply company water quality report doesn't show any magnesium in the water, add to those a GH Builder, like Seachem Equilibrium. Read http://www.plantedtank.net/forums/sh...ad.php?t=21944
to find out how to use these.