22
MAINTAINING FISHES
BIOLOGICAL POLLUTANTS: Any Organism, plant
or animal, which is brought in with the water might
be considered a pollutant. In some cases, these organisms can prove to be a nuisance. Well water is least
apt to contain biological pollutants. Tap water is free
of most biological contaminants. Lake and stream water will contain various organisms and should be filtered. The sand filter recommended for silt removal
will also remove most biological pollutants. If a sand
filter is not required wild fish and many other contaminants can be removed by a screen type filter
(Figure 3).
/LOAT SWITCH FOR PUMP SUPPLY
OR FIjOAT valve FOR GRAVITY "SUPPLY.
filter bag op
Saran screen
52 X 52 MESH
O.OOa YARN
CONCRETE TAN
3. Screen filter for removal of fishes and other larger
hiotic pollutants.
CHOICE OF pipe: The type of pipe (galvanized, copper, or plastic) to be used for the water
supply leaves room for debate. New copper and gal-
MAINTAINING FISHES
BIOLOGICAL POLLUTANTS: Any Organism, plant
or animal, which is brought in with the water might
be considered a pollutant. In some cases, these organisms can prove to be a nuisance. Well water is least
apt to contain biological pollutants. Tap water is free
of most biological contaminants. Lake and stream water will contain various organisms and should be filtered. The sand filter recommended for silt removal
will also remove most biological pollutants. If a sand
filter is not required wild fish and many other contaminants can be removed by a screen type filter
(Figure 3).
/LOAT SWITCH FOR PUMP SUPPLY
OR FIjOAT valve FOR GRAVITY "SUPPLY.
filter bag op
Saran screen
52 X 52 MESH
O.OOa YARN
CONCRETE TAN
3. Screen filter for removal of fishes and other larger
hiotic pollutants.
CHOICE OF pipe: The type of pipe (galvanized, copper, or plastic) to be used for the water
supply leaves room for debate. New copper and gal-