Thanks for the concern Cort, and the advise TX, I did price them out today at HD, at the 20 Gal BRUTE Commercial line grey was $20 with flat lid, seems the way to go.. The only thing I can say about the non-Brute series is that they have 5" flat areas around the container simply for looks, but it might be better for the uniseals,, IF that is an issue.. IS IT???? Or would the newer bulkhead-style that CC is pushing now be great?? Hey TX,,, In a perfect world, assuming I have environment under control; A/C, De-Humidification, shit-tons of vertical bare bulbs, etc... would you go with the 32 Gallon? Have you ever seen anyone utilize that kind of space for root mass in UC or is it totally unnecessary and the 20 is PLENTY? I suspect it will hold apporox, 13-14 gallons of actual water.. I have all the big accessories to make it jive; ie: 1HP Chiller, big water pumps, big air pumps, 3/8 air lines w/ 9" discs.. Hoping to drop in 18K vertical (13 minimum) on 12 plants in this BIG undercurrent/mpb.. Ive been rocking this DIY/UC system for the past year, but with 18-21 gallon totes.. Why isnt anyone using these big round containers.. It should damn near create a vortex inside with the pvc cut at 45s.. Well, that's my great idea,, so PLEASE tell me what's wrong with it SOON, as my building will be here next Wednesday and I need to be shopping.. (like I have money to) Damn I need a harvest, lol.. Thanks all ~ Lovin You ~