Why this number
Substrate volume ≈ length × width × depth. Bags are sold in liters — this tool estimates liters and a rough count of ~9L aquasoil bags.
How to use
- Enter the planted footprint (not the full tank if you use sand foreground only for part of the base).
- Choose depth (often 3–6+ cm depending on plants).
- Buy one extra bag if slopes/hills are planned.
FAQ
Sand denser than aquasoil?
Yes — bag weights differ. Liters are the shopping unit; rinse sand thoroughly.
Dirted Walstad?
Cap thickness still matters — calculate the mineralized soil + sand cap separately if layered.