like big54bob said. clown plecos and bristlenose plecos are good. they stay nice and small and are soooo cute. especially when small. i love em to bits. look on
PlanetCatfish • Welcome! for any ideas on bottom feeders.
as for the khuli and shark compatibility. i think they would be ok.red tailed sharks tend to go for territories and any fish trying to get in them. i have had plecos and cories with a redtailed shark. just dont get a ruby shark. they are lethal.