Scale a product label dose to your aquarium's net water volume.
Open live calculator →A label dose of 5 ml per 100 litres becomes 8 ml for 160 litres.
Follow the product label and its maximum frequency.
Convert a label instruction such as millilitres per 100 litres into the amount appropriate for the net water volume entered.
The live tool updates immediately and shows the result in the units commonly used by aquarium keepers around the world.
Use the product label as the authority.
Do not combine products unless instructions allow it.
Recheck whether the label uses net or gross volume.
Divide your net water volume by the label's reference volume and multiply by the label dose. For example, 5 ml per 100 L becomes 8 ml in 160 litres of real water volume.
Actual (net) water volume. Substrate and décor can reduce true volume by 10–20%, and dosing to the sticker size overdoses by the same margin—significant for medications.
Only when the manufacturers explicitly allow it. Some combinations react—water conditioners with certain medications, for instance—so stagger products unless the labels say otherwise.