i use it to rinse cheap second-hand crushed coral, to use in my Calcium Reactor - to dissolve all the phosphate that binds to the surface of aragonite.
u can use it instead of Bleach to kill pest algae or bugs in and on live reef rock.
retail price: $83
http://www.sigmaaldrich.com/catalog/...g=en®ion=CA
asking: $50
i have lab grade Sodium Hydroxide, to neutralize, if u want aswell
text: 604 779 1085