Where to get small smooth pebbles?

[Zeonic]

The shop on the right after Edison, just before aqua empire, has it. There are a few types in buckets on the floor. $2/kg. The shop that has lots of fish tanks. Pasir ris farm way 2.

[Urban Aquaria]

I happened to pop by Mainland Tropical yesterday, they do indeed sell the same small pebbles in packs. Bought a $7 pack to try.

It looks light grey in the pack initially, but once i washed the pebbles in a bucket and they turned a nice dark grey/black color, very nice.

[trashedbox]

I happened to pop by Mainland Tropical yesterday, they do indeed sell the same small pebbles in packs. Bought a $7 pack to try.

It looks light grey in the pack initially, but once i washed the pebbles in a bucket and they turned a nice dark grey/black color, very nice.

Yup. I brought mine from there too.
Notice quite a number of places selling.
But that is the only place where I find the color and sizes matches what I wanted.