So
http://www.aquaessentials.co.uk/index.p ... ts_id=1737 - £26.99 each (7kg each) so I will need 3 bags for 120l
limpopo black - £15.99 per bag - 12.5kg per bag. I will need minimum 2 bags, but possibly 3 bags will at 37.5kg
Either way I am looking at spending at least £75 to fill my...