Potassium (K) is a one of the macro nutrients (NPK) which is vital to abundant plant growth. When insufficient, leaves are yellow and unhealthy. Full 3x per week dosing with LCA Potassium will provide enough nutrient to maintain powerful growth in a planted aquarium.INSTRUCTION: Dosage rate for 100L TankSHAKE WELL BEFORE USEUse 1 pump (2ml) per 100L, 3x per week with 50% weekly water change. • For HIGH LIGHT tanks with injected CO2, dense plant mass and good flow - instead use 3 pumps per 100L, 3x per week (maximum dosage) with 50% weekly water change.• For LOW LIGHT tanks, dose the normal amount but only 1-2 times per week.'*Amounts above are for reference only. Your planted aquarium may need more or less depending on many factorsWARNING: 3 PUMPS PER 100L IS THE MAXIMUM DOSAGE. DO NOT OVERDOSE Analysis3 pumps (6ml) in 100l yieldsPotassium (K) - 7.5ppmNitrogen (N)- 0.55ppmSulphar (S)- 1.05ppmTarget ranges in parts per million (ppm) from low light to high light planted tank respectively.Nitrate (NO3) range 7.5-30 ppmPotassium (K) range 7.5-30 ppmPhosphate (PO4) range 2.5-6 ppmIron (Fe) range 0.5-1.5ppm (or higher in some cases)**It's important to note that these are equivalent weekly doses. For example, to achieve 20-30ppm nitrate you would dose All-in-One Fertiliser 3-4x per week.**KEEP OUT OF REACH OF CHILDREN