Hardness can be determined using {HEAD ~ a variety} of {TAIL ~ commercially available water test kits}, for example, using a test kit sold under the trademark Monitor C™ by Fleetguard, Inc 
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Hardness can be determined using { HEAD ~ a variety } of { TAIL ~ commercially available water test kits } , for example , using a test kit sold under the trademark Monitor C ™ by Fleetguard , Inc
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH