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Re: Profile

In a message dated 00-02-04 15:51:46 EST, you write:

<< It is inert and not imbued with iron as is Flourite, but after reading 
 product literature and speaking with a representative from Aimcor, all 
 indications are that it possesses a relatively high CEC. >>

I am interested in using Profile as my substate for my soon -to-be planted 
120 gallon. 
I was reading your response to someone asking about it and clipped the above 
I dont mean to sound ignorant.. but what does CEC mean?  Im guessing some 
content..but couldnt figuer it out.  Now my curiousity has got me!