Hi.
My adeniums are planted in large terracota pots that rest on a concrete slab. I use 3 equidistant pieces of ceramic tiles around the bottom edge of my adeniums' pots. That raises the pot off the slab, allows better drainage and air circulation between the slab and the pots. I checked out theready-made pot feet at HD. They are stilish, but broken tiles are almost free. Watch out for sharp glazed edges on ceramic tiles, though.
Take care,
Sylvain.