To learn about mirco and macro for your plant, read this www.singaporehydroponics.com
NPK can be derived from Potassium Nitrate (KNO3) for Nitrate, Mono Potassium Phosphate-(KH2Po4) for phosphours and Potassium Sulfate (K2SO4)for Potassium. All these except Potassium Nitrate are sold in Nature Aquarium. Nitrate is banned now.
For a 100L tank and if you aim at:-
N at 30ppm per week, mix 90g in 600ml will give you 10ppm (dose 3x per week)
P at 3ppm per week, mix 7.2g in 600ml will give you 1ppm (dose 3x per week)
K at 30ppm per week, mix 117g in 600ml will give you 10ppm (doese 3x per week)
By the way, we normally call mirco as trace and macro are NPK. Base fertiliser is just base fertiliser, mostly with mirco plus marco.
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