Weco Wonder Shells are great for pH, calcium and water hardness control in small aquariums and fish bowls. These all-in-one treatments provide calcium carbonate, sodium thiosulfate, and necessary trace elements, including magnesium.
Weco Wonder Shells provide magnesium and calcium, which have been proven to help fish during stress and to prevent disease due to acid buildup in the body. These shells instantly remove chlorine and chloramines from tap water while also clearing cloudiness. Scour inner glass walls with a Wonder Shell to remove scum and to deter its return.
Small: Bowls up to 1 Gallon
Large: Tanks up to 5 Gallons
Super: Tanks 10-15 Gallons
Giant: Fish Ponds