I have used 3 different sized grow tents from lighthouse HYDRO (not Max different company i think.) (2.6x2.6x5, 4x4x7, and 6.5 x6.5 x6.5) and i do love them.
Putting them together was the biggest pain though. but they hold there structure very well. they don't feel flimsily like they are going...
Normally 24 hours should be good to de-chlorinate your water. you can get a de-chlorinating filter that hooks to a hose for under $40 or chemicals to help dissipate it faster.
but for your peace Lilly if they are turning brown or black. it's either over fertilizing or to much light in my...