I came across this while googling on pet mice odor. It claims if you add it to their water it "virtually eliminate these odors". See it here: http://www.petfooddirect.com/store/product1.asp?pf_id=101037201&affiliateCode=PF012803&cm_ven=Performics&cm_cat=I-search%20(Froogle)&cm_ite=DDI%20Link I have five male mice in a 10 gal house and the odor gets, well you can imagine how it gets with 5 mice in a fairly small room (about 175-200 sq. ft). Any comments? Has anyone tried to use one of these water additives? Do they work? thanks