In a message dated 97-09-19 09:28:13 EDT, you write: << I keep it forever. It is not alive. I keep wet peat in a 5G bucket with a hex UGF (sans gravel) running in it. The water motion thru the sunken peat seems to keep it forever in a sweet condition (i.e., no "anaerobic" decay). The water in the bucket then becomes my extract source. Wright >> Have you ever tested the hardness of the water in this bucket of peat? I am curious as to whether it will eventually measure zero. I have experimented with a new product called "Tank Soft". It can drive hardness down to below measureable levels using the standard <drops and titrate> test kits. Bob