A bucket arrangement ( 1 ) including: a bucket ( 10 ) configured to contain a volume of liquid for use in cleaning a surface a treatment station a flow path for liquid from the liquid volume ( 15 ) to the treatment station ( 30 ) and a flow path for liquid from the treatment station to return the liquid to the liquid volume after treatment by the treatment station ( 30 ) wherein the treatment station includes a source of ultra violet radiation configured to expose the liquid in the treatment station to ultra violet radiation to treat the liquid and/or a silver based antibacterial device ( 70 ) configured to expose the liquid in the treatment station to silver to treat the liquid.
