Rad & Al said it all.
None of my friends are into the hobby.
When I have visitors they love marveling at the tank, and of course they want an explanation of everything. Trying not to take all night long telling them things they are not going to understand (not saying you don't understand it). I tell them my wet/dry is a boilogical filtration system, the 100lbs of $5lb live rock is full of good bacteria,organisms, & neccessary for aquascaping & coral placement(they never understand paying $5lb for a rock), I compare my fuge to like bays,marshes, & wetalnds feeding into the ocean, all the powerheads simulate the ocean current, and the protein skimmer is just like when waves crash on the sand leaving foam & dark skim on the sand.
All we are doing is trying to copy what mother nature does for our oceans.
This may be very elementary, but that is the way I see it.