Two portholes and an open base to swim through.
Two portholes and an open base mean there is no dead end inside. A fish can enter one way and leave another, which is the difference between a retreat and a trap.
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Why you'll love it
Plenty of novelty ornaments mould the openings shut and sell the look alone. This one is hollow with a clear route through, so it earns its footprint as cover rather than clutter.
Live planting settles into greens and browns within a season. One warm toned piece gives the eye somewhere to land, which is why bright ornaments outsell naturalistic ones by a distance.
Painted plaster chalks and clouds. Sealed resin comes through years of siphoning with its colour intact and without nudging the water chemistry.
Good fit if
Look elsewhere if
A cave with one entrance is a dead end, and cautious fish treat it accordingly. Anything that can be cornered inside will hesitate at the mouth and often decline to go in at all, which means the shelter you provided is not doing the job you bought it for.
Two portholes plus an open base gives multiple routes in and out. A fish can leave whichever way something is not approaching, and that makes it a space they will actually use rather than inspect. In a tank with more than one territorial fish it matters more still.
The risk with any ornament containing holes is a fish that fits in and cannot get out, or one that wedges part way. Measure the widest fish in the tank against the openings, and remember that a fish still growing will be a different size in six months to the one you assessed today.
The rule is that an opening should be either clearly too small to enter or comfortably larger than the fish. The dangerous middle ground is a hole a determined fish can push into, which usually happens at night when nobody is watching. Reassess every time you add a new species.
Put it in the mid ground rather than against the back glass. Being able to see into the openings means you will notice a fish that has taken up residence and stopped coming out, which is often the first sign that something is wrong.
Bed the base into the substrate so it sits firmly and cannot be tipped. If you have several small fish, a second retreat elsewhere in the tank is worth adding, since one shelter in a community tank becomes something to compete over rather than something everyone benefits from.
Keep it out of the direct filter outflow. Fish use a retreat to rest, and a shelter with a current running through it is one they will use far less than a still one. Somewhere sheltered by planting on at least one side works better than open floor.
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The details
Loved by real pet parents
I wanted something the smaller fish could actually use rather than just look at. The arched opening underneath is wide enough that my harlequin rasboras run through it and out of a side porthole all day long. At 13 cm tall it suits my 54 litre tank without dominating it.
Once the planting filled in, my tank had drifted into all greens and browns and was starting to look flat. This is the only warm toned thing in there now and it lifts the whole layout. Two of the tetras have taken to hovering in one of the round windows, which I did not expect at all.
At roughly 135 g it is not a heavy piece, so on day one the filter flow nudged it a few centimetres across the gravel. Pressing the base down into the substrate sorted that and it has stayed put since. Bright finish and the openings are genuinely hollow rather than moulded shut.
Bought as a bit of fun for my son's first tank and I assumed it would be purely decorative. The hollow inside has become where the corydoras pile up during the day instead of sulking under the filter. Good that the whole shape is open rather than a solid novelty lump.
The two round side windows are smaller in person than the photo suggests, so anything larger than a neon is not getting through them. The arched base is the useful entrance and everything uses that instead. Still pleased with it, just do not buy it as a hide for a chunky fish.
Nine months and a lot of water changes in, the yellow has not gone dull or patchy in any spot. I had a painted plaster piece years back that went chalky and clouded everything, so that was the thing I was watching for. It also sits flat on sand without leaning over.
It does everything it claims, the base opening is properly open and the fish use it daily. The yellow is more muted and mustard toned than the bright pineapple in the photo, which was mildly disappointing given colour was my whole reason for choosing it. A perfectly fine ornament otherwise.
My betta had been wedging himself behind the filter every night, which I was not keen on. He moved into the pineapple within about three days and that is where he settles now. Nothing sharp anywhere on the openings, and his fins have stayed in good shape.
At 7.5 cm square it uses hardly any floor space, which matters a lot in a 30 litre. It still reads as a proper feature because all the size is in the height. Cleans up in a bucket of tank water with a soft brush and goes back in looking new.
Good questions
Yes. The arched base opening is the one a betta will use; the round side portholes are narrower and suit smaller fish or shrimp passing through.
It is sealed resin rather than surface painted plaster, so it survives water changes and gravel vacuuming. Scrubbing it with anything abrasive will still take the finish off.
No, it sits at about 135 g and stays put on gravel or sand. Press the base in slightly rather than balancing it on top of a deep substrate.
Bottom dwellers and shy species usually take to it quickly, especially with two exits. Fish that prefer open water may ignore it, and that is fine: having the option available still lowers stress.
Check the openings and seams with a stocking drawn over them first. Anywhere it snags is somewhere long fins will tear, and a betta uses a retreat repeatedly through the day.
Scrub it in a bucket of water taken from the tank during a water change. Never soap, and rinse new ornaments under warm running water before first use.
Last reviewed 30 August 2026