Special breeding ground for plants with iron and microelements. Due to its micro porous structure facilities flow of nutrient substantions. Its structure assures also excellent conditions for habitation and development of bacteria. (supports nitrites and nitrates decomposition).
It doesn’t containd phosphates or nitrates.
You can use it to all freshwater tanks as main breeding ground or mix with other gravels.
Analise: Si02 – 55% Al2O3 – 35% Fe203 – 3% MgO – 0,5 %.