Hanna Combo pH & ORP + Temperature Tester rock-bottom If you flush out the

If you flush out the salts and dry out the water

AO 36/40 plugs fit well into the hole sizes provided by the blocks

and chelator

California

Hanna Combo pH & ORP + Temperature Tester rock-bottom If you flush out theHI98121 is a waterproof meter that measures pH, ORP and temperature. The housing of this tester has been completely sealed against humidity and are designed to float. Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement. When the cloth junction becomes clogged and response time is sluggish, simply pull out 3 mm (1 8") to clear the clogging which will improve response time and