A rock that hangs in mid water.
It is a buoyant rock held down by a fine line, so it hangs suspended at whatever height you set. It is a trick, and the eye keeps going back to it.
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Size: Small
Why you'll love it
Most aquascapes put everything on the floor and leave the middle third bare. Something suspended fills that space, which is why a floating rock reads as far more dramatic than a bigger ornament on the substrate.
Bare, it looks like a plastic rock on a string. Tie Java moss or a small anubias to the top and let it grow in, and within a couple of months the line disappears and the illusion works.
The tether adjusts, so the same ornament works in a 30 cm nano and a 60 cm tank. Set it slightly above centre, because dead centre looks staged.
Good fit if
Look elsewhere if
Most aquascapes concentrate everything on the floor and the back wall, which leaves the middle of the water column empty. In a shallow tank that goes unnoticed; in a tall one it is the largest part of the view and it reads as unfinished, particularly if the fish are all bottom dwellers.
Something suspended fills that space directly. It also breaks up sightlines at a height where fish actually swim, which gives more timid species cover in open water rather than only along the bottom, and that changes how a tank is used rather than only how it looks.
The tether adjusts, so the rock sits wherever you want it. Roughly a third down from the surface tends to look best in a standard tank: high enough to be clearly floating, low enough not to be lost in the surface glare from the light.
Anchor the line under the substrate rather than to a visible weight, and check it after a week. The buoyancy is constant but a light anchor can shift, and a rock that has drifted to the surface is considerably less impressive than one holding position.
The tether is visible if you look for it. From the front at normal viewing distance it disappears against the background, particularly with planting behind it, but nobody should buy this expecting a rock hovering with no visible means of support under close inspection.
It is also frankly unnatural, which is the point for some keepers and an objection for others. If you are building a biotope or a naturalistic scape, this is the wrong ornament. If the tank is a display piece meant to be interesting, it does its job better than anything else at the price.
Give the fish a few days to get used to it. Most ignore a suspended object almost immediately, but a nervous or newly added fish may avoid that part of the tank at first. If anything is still keeping clear after a week, lower it or move it towards a corner rather than leaving it mid view.
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The details
| Size | Dimensions | Suits |
|---|---|---|
| Small | 15 × 13 × 8 cm | Nano and standard 60 cm tanks |
| Large | 17 × 11 × 16 cm | Tall or wide display tanks |
Judge on tank height rather than volume, since the effect depends on there being open water above and below it. In a shallow tank the large size leaves no room to hang properly.
Loved by real pet parents
Every layout I have ever done puts everything on the floor and leaves the middle third as blank water. Hanging this in mid water changed the tank more than any ornament twice its size would have. I set the tether so it sits just above the halfway mark, which looks less staged than dead centre.
Bare out of the box it looked like a plastic rock on a string and I nearly sent it back. I tied Java moss across the top surface and by month two the growth had hidden the line completely. Now visitors ask how it is staying up there, which is the entire point of it.
Getting the height right meant draining a little, adjusting, refilling and repeating, because it is not something you can judge from outside the glass. Once set it has stayed exactly where I left it for four months. I would just allow yourself half an hour for the first setup rather than five minutes.
There are two sizes and the small at 15 by 13 by 8 cm was right for my 30 cm cube, where the large would have swamped it. The tether adjusts down short enough that it hangs properly rather than pressing on the surface. It is the thing everyone notices first.
I tied a small anubias to the plantable top rather than moss and it has settled in well over three months. The rhizome sits proud and the roots have taken hold in the texture of the resin. Suspended planting looks unusual and it is the best thing in my tank now.
The resin body is properly buoyant, which is the whole trick, but it does mean the anchor end needs burying well or the rock lifts it. I put a flat stone over the base in the substrate and it has been solid since. Looks superb once it is settled and stops drifting.
I took the large at 17 by 11 by 16 cm for a 60 cm tank and the scale is right, it reads as a proper feature rather than a curiosity. The fish swim under and around it constantly, which they never did with the same volume of ornament on the floor. Water readings have not changed since it went in.
The rock itself hangs exactly as advertised and the effect from a distance is genuinely striking. The tether is fine but not invisible, and under my light you can see it clearly from the front until something grows over it. I am waiting on moss to fix that, which feels like a job I should not have needed.
I had reached the point where adding another ornament to the substrate made no difference to how the tank looked. Putting one thing in the water column instead did what three more rocks would not have. Inert resin so nothing has shifted in my parameters over five months.
Good questions
The resin is buoyant and a fine line holds it down to a weight or an anchor in the substrate. You set the length; it floats up to it.
At first, yes, if you look for it. Once moss grows over the anchor point and the tank is lit from above, most people stop noticing it.
Yes. Tie moss on with cotton thread or fishing line and it will attach itself within a few weeks. Do not use glue in a tank with shrimp.
The resin body is buoyant and a fine line tethers it to the substrate, so it pulls upwards against the anchor. Adjust the line length to set the height.
If you look for it, yes. At normal viewing distance with planting behind it, it disappears. It is not invisible under close inspection.
Yes, the top surface takes Java moss or a small anubias tied on with cotton thread. Give it a couple of months to attach properly before removing the thread.
Last reviewed 30 August 2026