FWIW:

OASE Mineralife, "Essential Trace Minerals for Koi and Pond Fish"
contains copper as well as zinc, aluminum, boron, bromine, calcium
chromium, chlorine, cobalt, iodine, iron, lithium, magnesium,
manganese, molybdenum, nickel, potassium, selenium, sodium, strontium,
sulfur and vanadium.

Kent Koi Essential, "Essential Trace Mineral Supplement for Koi and
Other Pond Fish" contains Copper sulphate, Zinc chloride, Potassium
chloride, Calcium chloride, Magnesium chloride, Potassium iodide,
Chromium chloride, Cobalt chloride, Ferric chloride, Manganese
chloride, Nickle chloride, Sodium metavanadate, Sodium molybdate,
Sodium selenate and Strontium chloride.

U.S. Aquagarden Vigor, "Essential Trace Minerals for Koi and Pond
Fish" is identical to the Kent product, also containing copper and
zinc.


Steve J. Noll | Ventura California
| Glass Block Pond http://www.kissingfrogs.tv