TY dougall & NC! The spine doesn't scare me too much, some corydoras have similar venom (& only my husband got jabbed by 1 of them once). Do you have a guess as to how they'd be with the loaches? The sewellia aren't very shy, they like a bit of push & shove, mild chasing for the "good" rocks. Akysis are a little bigger & I don't think the loaches have spines like some. Does their venom actually kill other fish? Of course I think of scooters & mopeds when I read vespa, lol.
I wonder if they'd be ok on Eco Complete? It's not the sand, I call it very small smooth-ish gravel. But it's a lava product so, ya know, a bit rough. Actually burying for small scaleless cats might be difficult but I have lots of smooth river stones with crevasses if that might be acceptable.
I do know I may never get any loach fry again & I think I'm ok with that. I only see a fry or 3 every year or so. Plus 12 years...I need to shake things up...maybe with sawakensis rasboras soon too.
1 more reference
Akysis prashadi – Indawgyi Stream Catfish — Seriously Fish so I've looked at the big 3 cat sites I trust.