So this is gonna be my first rack ever and I'm gonna make something that I can grow with. I'm gonna make a six shelf rack with the bottom 4 holding 28/41 qt tubs and the top two holding 15/32 qt tubs. I'm going with melamine for the wood and I'm gonna have to make some modifications to fit my needs. I don't have a dedicated room for snakes so it's going in my bedroom which is 65-70 during the cooler months and 75-80 on the hotter months. To fit the different sized tubs and to provide plenty of radiant heat I'm going with 2 strips of 12 in heat tape, one in the front and one in the back for hot and cool side temps and so whatever size tub I have in there it'll have plenty of heat on both sides. They're gonna be snakes through to provide even more heat. I'm putting reflective insulation on the sides, back, top and bottom to keep heat in and radiate it back to the tubs as well as drilling holes under the heat tape so the slightly warmed air moves to the tub underneath. Also, I'm not gonna drill holes in the front half of the tubs, only a few in the back to control humidity. I've done hrs of research and it seems like everything I'm doing will raise temps enough in the tubs to make up for the lack of temp in the room. I have everything but the wood but I'll be posting my project once I get going on it and complete it.