Filter material that absorbs nitrates (NO3) (up to 3600 mg in 48 hours), ammonia and nitrites from the water. Prevents the formation of algae. To be used without trace elements and PH regulators.
Change: recharge with salt every 5 days until nitrate is less than 20 mg/L then recharge every 2 weeks or when nitrate exceeds 20ml/L. Replace after 10 times recharge.
