The

Aquaponic


Constant


Flow

system

below

shows


a

single

grow

bed

designed

for


using


without


a

grow
medium.


These


beds

are


flooded


to


an

approximate


depth


of


12

inches


and

flowing

continuously

from

and

to
the

fish

tank.



The


plants

are


secured

in


a

floating


platform

with


the


roots


extending


directly

into

the


water.


With
this

system,


you

need


to


make


sure


the


water


is


properly

aerated


to


give


the


plants

sufficient


oxygen


to
the

roots.
Aeration

for

Constant

Flow

Systems
Building
an

Aquaponics


air

flow


aeration

system

is


a

little


labor


intensive.



I


don’t


mean


difficult


though,


just
time

consuming,


however


it

can’t


be

beat


for


creating

bubbles


over


a

wide

area


and

oxygenating


the


water.
Basically
it


is


very

simple
For
your


Aquaponics


system

you

can

use

an

air

pump


or


large


commercial


oil

-

less


air

compressor


(which


ever
you
use,


it

must


to


be

oil

-

less).



It

is


recommended


that


the


air

be

pumped

through


a

high


pressure


copper
tubing

supply


line.



A

regulator


outlet


valve


can

be

attached


and

used

to


provide


a

lower


air

pressure


to


a

2
inch

PVC

manifold


leading


to


the


inflow

end

of


the


fish

tank.


From


the


manifold,

a

piece


of


1

inch


PVC

tubing
is

extended

about


10

inches


out


over


the


edge


of


the


fish

tank


and

elbowed


at


a

90°


angle


toward


the


bottom
of

the


tank.



Another


90°


elbow

is


installed

at


the


end

and

another


piece


of


1

inch


PVC

is


then


run


across


the
bottom
of


the


tank.



It

sits

about


2

inches


from

the


bottom

of


the


tank


and

running


from

one

side


of


the


inflow
end
of


the


tank


to


the


other


and

a

capped


is


installed

on

the


end.


That


portion

of


the


tube


is


where


the


actual
intensive

labor


comes


in.
Before

it

is


installed,


naturally,

to


create


this

section,


draw

straight


lines

at


1/4


inch


intervals


around

the


1

inch
PVC
from

one

end

to


the


other;

then


mark


them

at


1/4


inch


increments


from

one

end

to


the


other


and

draw

a
line
around

the


tubing


at


each

mark.


Using

a

1/32


inch


drill

bit,


drill

tiny

pin

-

holes


where


each

of


the


lines
intersects.

It

is


permissible

to


even

drilled

holes


in


the


end

cap

just

for


good


measure.



I


mean


why


not,


it

was
there!
This


is


the


difficult


part


as

the


drill

bit

is


hardly


larger

than


a

needle.



A

larger

pin


hole


can

be

created
using

a

1/8


inch


bit

if

desired,

but


the


smaller


holes


create


a

much


finer


stream.
Suffice
it

to


say,


it

is


possible

you

will


break


a

number


of


bits

before


you

finished.



However,


the


results


are
well

worth


the


effort.


A

study


stream

of


foam

like


bubbles


can

be

created


which

can

actually


cause

the


water
to

boil

up

at


least


1

to


1

½


inches


above


the


water


level

of


the


tank


all


across


the


end

of


the


tank.


A

note


of