The Slightly brackish water would perhaps be the ideal, with the specific gravity maintained around the 1.005 mark.
fulfill
fuse
generate
geography
geometry
germ
graph
gravity
guarantee
hemisphere
heredity
hierarchy
homogeneous
horror
hostile
hypothesis
ignore
illuminate
illustrate
imperial
implement
implicit
imply
import
impose
impress
incentive
incessant
incline
incompatible
interval
intervene
intimacy
intrinsic
intuitive
invade
inverse
invest
investigate
invoke
irrigate
isolate
judicial
kindred
launch
layer
lecture
legislate
legitimate
leisure
lens
liable
liberate
linguistic
litigate
locate
locomotion
logic
manifest
manipulate
margin
maternal
matrix
metabolism
metaphor
microscope
migrate
modify
moist
molecule
momentum
monarch
morphology
nerve
niche
norm
notate
null
term
problems
rice
declined
Slightly
would