Smokey McSmokster- Thatz what I'd be screamin' too! I'd rather reserve the old bathtub for some outdoor root-locked beauties... I'll stick with the 5-gallon bucket over a grate and drain-pan system inside I believe... Not to shit on that idea... I'm sure you could grow some hella donkey-kong kolas up off of a super-cropped bathtub giant or two! But, hey, if the elevated pot system on top of a tub works for you, then rock on dude! You could even affix a carbon filter to your fart-fan and use it for something besides farts, now... lol...