Best water supply is water filters

Food is prolly growable food like potatoes

Just plant bulbo trees. They are on islands.

Bulbo fruit

Marblemelons

I could never grow the big ones. Did you have to have the interior growbed

I used the growbed for the bulbo tree.

Filters, tank breeding and exterior and interior farmbeds

If you're like me and take the Cyclops everywhere, you'll be just fine with melons or some other crop for both food and water. If you take long expeditions away from a base in the PRAWN or Seamoth, cured Reginalds from an Alien Containment and the big filtered waters from the Filtration Machine are best.