The chlorine or other soluble material within the bag or {HEAD ~ sachet} is dissolved or subjected to a leaching action in {TAIL ~ the liquid} 
The chlorine or other soluble material within the bag or { HEAD ~ sachet } is dissolved or subjected to a leaching action in { TAIL ~ the liquid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL