Permanent silicate removal. Silicate supports the growth of diatoms in marine water aquariums. sera marin silicate clear easily and permanently binds silicate.sera marin silicate clear is delivered with a practical filter media bag. Briefly rinse with running water before use then simply place in a filter or a place with good water circulation. Remains active up to three months depending on the silicate level.500 g (1.1 lb.) are sufficient for an aquarium holding 200 400 liters (53 106 US gal.).Tip: The sera SiO3-Test kit allows to reliably monitor the silicate level.