80 litres diesel in the S/S tank, spare fuel in 10 and 20 litre containers. 280 litres of water in three S/S tanks plus 20 in the hot water heat exchanger. Carry 2 or 3 15 litre containers as well. Lots of fuel and water is good.
It would also be good to know the boat size.
Mine is 31ft I have a 100lt diesel fiberglass molded tank and only 100lt of water also in a fiberglass molded tank would love a desalination unit it is going up the list slowly.
1000 ltr water in 2 x 500 ltr tanks, diesel 500 in 2 x 250 ltr tanks. 46ft Savage Oceanic a beautiful little ship.