River Rock
Also sold as Smooth river stones · Pebbles · Cobbles · Round River Stone · Zen Pebbles
River Rock is an aquascaping rock sold by the piece, typically around 10 × 6 × 7 cm (3.9 × 2.4 × 2.8 in). In the water it leaves the water chemistry alone, does not tint the water, and sinks straight away.
Try it in a tank
Put River Rock in a 3D tank at your size and see how it sits with everything else. Free with an account.
At a glance
| Material | Rock |
|---|---|
| Raises hardness | No |
| Tannins | None |
| In the water | Sinks right away |
| Edges | Smooth |
| Prep | Rinse |
| Default size | 10 × 6 × 7 cm (3.9 × 2.4 × 2.8 in) |
Shapes · No two pieces look the same. Pick a shape to see it.
Before it goes in
- River Rock is inert: it will not move KH, GH or pH, so it is safe in a shrimp tank and in soft water.
- Before it goes in, rinse it.
- 4 different pieces of River Rock are modelled, so the one you place looks like one you could actually pick out of the bin.
- A default piece is 10 × 6 × 7 cm (3.9 × 2.4 × 2.8 in); you can stretch it to whatever you bought.
River Rock: care and setup
Does it raise pH and hardness?
No. It is inert, so KH, GH and pH stay where your tap water puts them.
Do I need to prepare it?
Yes: rinse it before it goes in.
Will it tint the water?
No.
What it goes with
- Plants you can tie or glue straight onto it: Anubias nana 'Petite', Subwassertang, Anubias barteri and Bucephalandra 'Green Wavy'.
- Substrates that leave the water where it is, the same as this one does: Walstad, ADA Amazonia and Colored Gravel.
Often compared with
| River Rock | Lava Rock | Red Lava Rock | |
|---|---|---|---|
| Raises | None | None | None |
| Tannins | None | None | None |
| In water | Sinks | Sinks | Sinks |
| Prep | Rinse | Rinse | Rinse |