Substrate Amount Needed

[mattyd1701]

hi ordered my tank yesterday and im going to do a first time planted tank, im looking at buying soil substrate the tank is a 48L (12US Gallons) would a 2KG Bag of soil be enough for the tank or would i need more?

http/www.aquaessentials.co.uk/fluval-plant-stratum-2kg-p-5368.html?zenid=64328d00ed3de533bc014efc40b10dc5