Garden kind so maybe lots of rock and see what happens, also some ground beetles and isopods? Can't have spiders or scorpions"Harmless centipedes" he says Aguably, most T's are safer than many centipedes You could always go for a scorpion. Those can't climb glass, many can be kept communally in a 5 gal, and they are probably less likely to escape than centipedes. What type of centipedes were you looking at? Garden variety or internet bought?