Potassium sulphate

3 In stock
Aquarium Plant Fertiliser
17.95 AUD
K2SO4 Dry Fertiliser :
29.95 AUD


Potassium Sulfate (K2SO4) is a source of Potassium (K) necessary for protein synthesis and Iron (Fe) metabolization.

Sulfur (S) is essential for root development.

Instructions per 100L:
Add 1.65 grams into 100L tank twice per week with 30-50% weekly water change.
*Amounts above are for reference only. Your planted aquarium may need more or less depending on many factors
Advanced users:
  • 1.67 grams into 100L will yield
  • 7.50ppm K
  • 3.08ppm S
Store in cool dark environmentKEEP OUT OF REACH OF CHILDREN
Potassium is one of the most important nutrients for aquarium plants. It is the member of the  NPK group (Nitrogen, Potassium, Phosphorus) which are the most important nutrients for aquatic plants. Plants need them in a huge amount regularly. So, often a shortage of potassium occurs in the aquarium. That’s when additional potassium has to be supplemented. Aquatic plants absorb potassium in the form of potassium cation K+ .

Potassium deficiency can be one of the most depressing problems in a planted tank. Water doesn’t usually contain it that much, so additional supplement is often required. Usually water doesn’t contain potassium more than 2 parts per million (ppm). Hobbyist often uses Potassium Sulfate aka K2SO4 to their aquarium to supplement potassium. The ideal potassium level in a planted tank should be between 10 to 50 ppm. Weekly 20 ppm of potassium for high light tank and 10 ppm of potassium for low light tank should be added.
Symptoms of Potassium deficiency:

=>small necroses are visible on the older leaves of the plant. They start as a small black spot on the leaves. But eventually they get bigger and often have a yellowish border around them.

=>New leaves become smaller in size and surface.

=>the older leaves may become yellow even before they die. The veins can turn to yellow too.

=>The edges of the leaves turn yellowish.

=> Brown dots can be visible on the leaves.

Dosage rate for 100L Tank

Low Light Tank 2 gram once per week - 50% weekly water change approx 
Medium Light Tank 4 gram twice per week - 50% weekly water change
High Light Tank 6 gram three times per week - 50% weekly water change
Limited Quantity Available - Will Sell out Fast!

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