Glether's Easy NFT (Nutrient Film
Technique) is easy to construct with materials available
at home improvement stores. The system uses 4 vinyl
gutters run parrallel. 4 drip lines feed the 4 gutters
and up to 60 plants.
The gutters are run in 10
foot legnths, with 2 inches of drop over that length.
The gutters drain into a 25 gallon res. Overgrow
recommends the use of light proof covered gutters and
reservoirs to avoid algae issues.
The system uses 3"
rockwool cubes set directly into the gutters. Covered
gutters are recommend (gutter covers are available at
most home improvement stores) to avoid algae problems
and root illumination issues. The drip lines feed at the
top of the gutters and drain back through to the
reservoir. The system employs a Little Giant NK1 210gph
water pump. The two center gutters drain straight to the
reservoir. The two gutters on the outside have 90 degree
elbows, as shown in the image below. The reservoir is
aerated by a whisper 400 air pump and air stone.
Glether uses multiple 430 watt Diamond lights
and claims to harvest on average 14 to 16 ounces per
light! One additional tip, he notes that clogged drip
lines are easily cleared using compressed air.