Only $2.26
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Description
Trough Blox are for use in any concrete or plastic water trough to prevent algal growth. Each block contains 63gm/kg of copper present as copper sulphate. Use one block in 7000L of water (1500gal). Break up block for smaller troughs. The block should last for 2-4 weeks. Available singly, or as a box of 20 blocks.
