WSD Trough Blox are for the control of algae and slime in stock troughs (plastic & concrete). WSD Trough Blox also provides a copper supplement to livestock.  

Each 200gm copper block contains 63g/Kg copper in a slowly soluble block for use in stock water troughs and usually lasts 4 – 8 Weeks.

Active Ingredient: Copper (CU) Present As Copper Sulfate @ 63g/kg