- Silicate (silicic acid, SiO₂) causes unattractive diatom algae in the aquarium. Mains water often contains levels of silicates which create problems with diatom algae.
- This filter material permanently absorbs silicate and phosphate, preventing the growth of diatom.
- 1 pack (500 g) absorbs 5000 mg/l SiO₂ and is sufficient for 200-400 litres.
- For freshwater and saltwater.