Since my rack system is made of shelves attached to my closet wall & I have a bad foundation I keep lids on my tubs. So I guess I can help a little. Also, my qt tub is solo & just slightly different. I use the thg heat tape (taped to the shelves for my "rack" and for the qt tub, its taped to the bottom of the tub on the outside [just remember to tape the thermostat probe to it first lol]) with thermostats. For the water dish, I use 5" ramkiens for sub & adults (3" for my eventual hatchlings) that you get in the baking dish isle. For hides, juvies&sub adults& adult males I use whatever is cheap & plastic that will fit in the tub. Tortilla warmers look nice. Just have to cut a hole in them. For my big girls, I use small cat litter boxes. My substrate is newspaper because its free (my dad delivers The Horse Gazette, a local equine newspaper, & he gives me the back copies). For vent holes, I heat up a meat fork & stab the short sides just 4 times. It keeps up the humidity just great. For a stand alone tub, I would recommended 2 hides or to drape a towel over one side of the tub. I use the Hefty brand 34qt for juvies to adult males & 50qt sterilites with the wheels popped off for my big girls. Hope that helps.