Ce sont les mots les plus souvent utilisés dans ce livre.
air
amount
another
area
bacteria
basic
better
black
blue
body
bottom
breeding
chemicals
cm
color
concrete
conditions
create
dealer
depth
disease
even
feature
feeding
few
filter
filtration
fins
first
fish
food
form
fry
garden
good
grow
growth
healthy
important
japan
japanese
keep
koi
large
layer
less
level
life
lilies
liner
live
may
metallic
must
natural
need
number
often
once
organisms
owners
oxygen
part
patterns
period
pipe
place
placed
plants
pond
pool
possible
problem
protein
provide
pump
quality
red
result
scales
shape
should
show
sides
size
small
suitable
surface
system
take
tank
temperature
time
two
type
use
used
variety
water
white