The growth of plants requires trace elements, in particular Potassium, Zolfo, Manganese and especially Iron.
In nature the current waters possess them of course but in the closed middle of the aquarium they quickly exhaust.
If one of these mineral oligoes fails this causes shortcomings of trace elements; especially of the Iron which plays a very important role in the production of chlorophyll and photosynthesis: "Law of the minimum..
BIOVERT contains no nitrates or phosphates.
Dosage: 1 Row every 200 liters every 15 days
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