I think the idea is to keep the trays dry and not have standing water in them
Grand Hotel... always the same. People come, people go. Nothing ever happens.
Uhh ok. Add some gravel and put the pots on top of that.
Oh this is for cacti?
Lol, maybe you shouldn't put them above gravel then lol. They really don't need watered much. I mean once a month or so is all I do.
Just put them in a tray and water a little tiny bit so that everything in the tray evaporates over a day or two.
It makes an *** out of U and Me!
I drench everything lol. But mine are outside and I don't have to move them around lol.