KOI Tips: What Happens When I Have to
Treat My Pond Fish?
It is imperative that you know the exact
number of gallons of water in your pond. In case of emergency, like fish that
are flashing (rubbing on the bottom or sides of the pond) or not
eating, swimming funny or showing other signs of illness you may
have to add salt or other medicines, and there is no way to
safely do this unless you know just how many gallons you have.
Ways to do this are: use a water meter
that attaches to the end of the hose when you first fill it up,
or move the fish to another container of which you know the
gallons (i.e. 10-gal. or 50-gal.). Or make sure nobody in the
house is using any water, even flushing a toilet, and make note
of the water meter reading before you start and when filled, and
call the water company with these readings. They can give the
total number of gallons.
Another way is to measure the pond by the
To determine gallons (in feet or inches):
Rectangular or square pond:
a. Volume (feet) = Length x Width x Average
depth x 7.5 = gallons
b. Volume (inches) = Length x Width x
Average depth ÷ 231 = gallons
Radius= ½ of diameter
Area= Radius x Radius x 3.14
Volume = (feet) Area x Average depth x 7.5
Volume = Divide the pond into circles,
squares or rectangles. Add the divided parts together.
BACK TO DIRECTORY