The most commonly dosed ferts are (K2SO4) potassium sulfate, (KNO3) potassium nitrate (don't dose both, that's probably too much potassium, do KNO3 if you need nitrate and K2SO4 if you need potassium), Iron Chelate, and Plantex CSM for trace minerals.
You could also use a PMDD (Poor Man's Dupla Drops).
As for CO2 or Flourish Excel, you should actually use both in moderation. Excel isn't CO2, it's a complex of Carbon in the form of water soluble Hydrocarbons.
You could also use a PMDD (Poor Man's Dupla Drops).
As for CO2 or Flourish Excel, you should actually use both in moderation. Excel isn't CO2, it's a complex of Carbon in the form of water soluble Hydrocarbons.
