I ran these in my tents this grow just as overflow protection. Great for inexpensive catch trays, sucky for drain trays. They have raised humps for reinforcement effectively making 1 tray with 6 or 8 little compartments so it's hard to get all the water out of them.If you have a tractor supply around you can check out the floor trays for dog kennels and stuff, they also have the boot trays. I haven’t used them personally but know a couple people that do use them.
Where you located I have a 4x4 tray I am not using anymore!I am looking for different options for trays in a drain to waste setup. Botanicare seems to be the main one that pops up, but finding online without $150+ freight shipping seems to be tough. I don't have a consistent place for one locally, although I will be checking a hydro shop a few towns over.
I'd like something that fits in a 4x4 tent. It doesn't have to be 48x48. Could be a little smaller if need be. I don't necessarily have to have the channeled bottom, but it would be nice to have at least some slope to concentrate the waste to one side or corner. I have no issue running pots on risers if it's a flat bottom with no channels. What is out there that fits the bill?