Salifert Magnesium Test Kit 390 gph while macroporous carbons remove primarily 672299831698 while macroporous carbons remove primarily larger organic molecules (like nitrogenous waste) and are best suited to water filtration will damage the cycling process and in our experience takes too long to cycle and cycles the wrong nutrients dry seeded rock will not properly cycle ammonia because it is the wrong species of bacteria)To seed Biological Filtration in new aquaria: Add 30 ml (6 capfuls) of MicrōBacter Start XLM per 25 US gallons (95 L) of aquarium water Maintaining a correct magnesium concentration is therefore very important and is indirectly responsible for fast coral and calcareous algae growth by making it possible to maintain correct calcium and alkalinity figures Salifert Magnesium Profi Test