- 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 packet (500 g) absorbs 5000 mg/l SiO2 or PO4 and is sufficient for 200-400 litres.
- For freshwater and saltwater.