Tetras and lifebearers (like platy) need the company of their own kind,
so always buy >3 of each species.

Which species are U looking for?

Try Jln Pasar. There are >6 LFS there. Find the shoplot
near the T-junction across the road from the banks (Not the roadside stalls).
It's got a few uncommon tetras U don't find at most LFS.

--
PS. Myself still looking for another kuhli.