each bit of gravel is anywhere between 3mm an 6mm diameter. there is a very small (say, about 6" by 5" sand section that i would be willing to increase to say 8x12 but i feel that this may still be too small, but then its only to satisfy the burying need... he can still wander up top around the rset or even bury in the gravel if he so wishes...
thinking maybe zebra loaches might be better, though i dont like them as much... lol all in the name of vain.
I may just go with the zebra loach if they are better with the gravel/sand (even then i know gravel can be bad for the barbels) and wait till i get the 4footer sand tank up for the khulis. but then i was gonna buy a horse faced loach for that tank... hell i can get both..