Atlantides Plus is a liquid formulation with phosphorus and potassium and is potassium phosphate, which is actually used as supplementary fertilizer, especially for enhancing plant immunity. Recommended Use: Soil and spray application Compounds: Phosphorous Soluble pentoxide in water ........................................... ............... 18% w / w Potassium-soluble oxide in water ............................................ .................. 16% w / w Supplied in packaging: 0/5, 1, 5, 25 liters