free - lye for gfo recharging (calgary)

[lastlight]

also known as sodium hydroxide or caustic soda.

used for recharging gfo as per this thread.

http://www.reefcentral.com/forums/sh...o+on+the+cheap

the process does work but i no longer have a tank and don't want to move a hazardous chemical to my new place.

still have most of the 3kg i bought.