Rex, you know I'm always willing to disagree with you if I don't agree. Fact is you tend to do the research, so you're not just tossing out random ideas.
Flourite would work just fine, but I think the color of the eco complete would look better...it'd look like soil in your little pots and would be 'cute' (I rarely use that word...its so immasculating). I don't think that small an amount of flourite would cause clouding issues though...but for aesthetics, eco would probably be best.