Beth:Something like this:That dark brown and yellow under the ultraviolet light is what happens when dogs do not get taken outside sufficiently.  

I should watch out, there may be some guys in dark suits and sunglasses knocking on my door soon.....YIKES!

It's the easiest as well, and everything can be bought at home & garden stores/walmart/homedepot.http://i223.photobucket.com/albums/dd154/tonytwotime_2007/IMG_0087.jpg(setup)http://i223.photobucket.com/albums/dd154/tonytwotime_2007/IMG_0088.jpg(bubbler is bubbling)http://i223.photobucket.com/albums/dd154/tonytwotime_2007/IMG_0089.jpg(a few plants for demo.)http://i223.photobucket.com/albums/dd154/tonytwotime_2007/IMG_0090.jpg(all plants i'm planting. some dirt, some hydro)Supplies1 large dark colored container1 dual outlet air pumpAir tubing2 air stones (to oxygenate the solution)solo cupsexpanded clay pebblesepsom saltgeneral hydroponic solutionutility knife, or drill with hole cutting attachment

Attorneys although professionals and schooled on practicing law, tend to blow smoke too!!

Most of the damage (though there was smoke damage throughout the whole house) was confined to a large addition.

Or is the info all smoke and mirrors to get you money?

You don't take away study hall from every student just because a couple of kids were caught smoking cigarettes outback...If you're mad about the gurus teaching bad ways to REI then become a (so called GOOD guru) and teach the right way to invest! 

Actually, I was never concerned when an investment doubled nor did I ever use the rule of 72s although I know the simplification, I always looked at annual yields and I'd smoke my calculator.

@Mike Mead the Rocky Mount meeting is January 18, 2017 from 6 p.m. to 7.30 p.m. at Prime Smoke House at 207 E.

The air filter looked pretty dark - lots of deferred maintenance here.