ok, so for the heron, i see a few tutorials with fluff and a few with out. can some one explain to me a few things? please? what is the advantage of fluff? can you use say.... cotton rayon instead of fluff? i don't have a heron yet.... i bought the clone first to see if this would be a tank i like. and i really like it. but before i buy the original, i just want to understand how it works and what the best build is going to be for me. hubby gave me the okay for the heron and another pricey topper for my upcoming birthday! NOV 1st. i have a beautiful gp paps lux, and i'm looking to get a "matching tank for it" i have the snp tank but i broke all three glass tubes with in a few days. anyways what are your thoughts on fluff? or no fluff? thanks.