Edwal Hypo-Check， Chemical Test for Exhausted Film &amp; Paper Fixers， 3/4 Oz.<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Edwal Hypo Check tests your fix solution for exhaustion due to silver saturation. </span></li><li><span class="a-list-item"> One or two drops will test the fixer and， if the fixers still OK， no harm has been done to the bath. </span></li><li><span class="a-list-item"> A 3/4 oz. bottle provides about 800 tests. </span></li><li><span class="a-list-item"> If the addition of Hypo-Chek produces a cloudy precipitate， the bath is exhausted and the fixer should be discarded. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31YvaZESZjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31JvDcujloL.jpg" noproxy>