In my 30 gallon breeder, I have a zoomed UTH(forgot the size). For my custom enclosure, I use an exoterra(i think the 11x10). For my hatchling tub I use some off brand that was on sale. When I do my rack I will be using 11" flexwatt and I have a free shelf that I got from work that I plan to use for quarantining and will use 3" flexwatt