Olá!
Não tenho carvão... tive o cuidado de o tirar e substitui por uma camada fina de lã de vidro. Neste momento tenho, esponja, cerâmicas e por fim lã de vidro. quanto à composição do fertilizante tirei isto da net...
"Ingredients: Boric acid 2.0 mg/l, Iron Chloride 890mg/l, Potassium Chloride 1.0mg/l, Magnesium Chloride 2.0mg/l, Sodium bicarbonate 0.6mg/l, Sulfuric acid 1.6mg/l, EDTA 4.0mg/l"
"Plant fertilizer with iron, minerals and trace elements for all water plants. The plant nutrients in sera florena can easily be taken up through the leaves by the plants. The nutrients stay active in the water until they are taken up by the plants. sera florena is free from nitrate and phosphate and does not promote algae growth"
Abraço