20 ml in 100 L of aquarium water, weekly – for example, after a partial water change or filter cleaning, to improve and stabilise the water quality
For increased requirements
40 ml in 100 L of aquarium water, weekly – for example, after treating with medication or for a large fish population
For measurable ammonia or nitrite content:
40 ml in 100 L of aquarium water, daily, until the ammonia/nitrite have fallen to 0 mg/L
Shake bottle before use. Add product in an area with good water flow, e.g. near the filter return flow in the aquarium.