Additives are
necessary for the survival of the animals in a saltwater tank or
freshwater tank. Won
Brothers has been offering solutions that help the hobbyist properly
care for and nurture their freshwater, marine or pond habitats.
Calculation
of pond volume: (L = length W = width D = depth R =
radius )
1. Square/rectangular: L x W x D x 7.5 = volume in gallons
2. Circular: R x R x 3.14 x D x7.5 = volume in gallons