Blubber Cove XL Aquarium Cave – Standalone Centrepiece Tunnel for Large Tanks

The Blubber Cove XL Aquarium Cave is the biggest cave in our range — a freestanding centrepiece tunnel designed to sit in the middle of large tanks rather than tucked into a corner. At 234mm wide on the Large size, it's built for tanks from 150 litres up where corner caves get lost and standard hides look undersized. The curved arch shape creates a dramatic visual anchor for your aquascape while giving plecos, corydoras and community fish a proper enclosed retreat. Precision-manufactured in the UK in PETG.

Why a standalone centrepiece?

Most aquarium caves are designed for corners — they hide in the dead space against the back glass. That works for small and medium tanks, but in a 150-litre+ setup, a corner cave disappears. Large tanks need a centrepiece: a feature that anchors the aquascape, draws the eye, and gives fish a proper destination to swim toward. Place it dead centre, on a sand bank, or surrounded by driftwood — and let it be the focal point your tank deserves.

Features

• XL footprint — biggest cave in our range, built for tanks 150 litres and up
• Standalone centrepiece shape — designed to be a tank focal point, not a corner accessory
• Curved arch tunnel — wide opening for adult plecos, large catfish, big community fish
• Substrate-friendly base — sit visible, partially bury, or fully bury for an underground effect
• Smooth interior — gentle on delicate fins and shrimp moults
• Precision-manufactured in Northumberland, UK from PETG
• Wide enough for shoaling species to retreat as a group

Specifications

• Material: PETG plastic
• Standard size: 190 × 121 × 78 mm (60 mm opening)
• Large (XL) size: 234 × 150 × 97 mm (81 mm opening)
• Placement: Standalone — centre of tank, not corner-fitted
• Tank size: Standard suits 60L+ · Large XL suits 150L+
• Colours: Black, White, Marble Effect, Moss Green, Sand
• Made in: Northumberland, United Kingdom
• Brand: Blubber Cove

Suitable species

• Adult bristlenose plecos, common plecos, sailfin plecos
• Large catfish — synodontis, twig catfish, clown loaches
• Corydoras shoals (the XL fits a group together)
• Cichlids — apistogramma, kribensis, electric blue acara, severums
• Angelfish and discus (community refuges)
• Neocaridina and Caridina shrimp colonies

Choosing the right size

• Standard (190 × 121 × 78 mm): medium tanks 60–150 litres, larger community setups, multiple plecos
• Large XL (234 × 150 × 97 mm): large tanks 150L+, adult plecos, big community setups, monster-tank centrepieces

How is this different from your other Blubber Cove caves?

Two things — placement and size. This is our only standalone centrepiece cave (every other cave in our range is corner-fitted or foreground-placed). And the Large XL variant is the biggest cave we make — designed specifically for tanks where smaller caves look out of scale.

Aquascape placement ideas

• Dead centre: primary focal point with plants radiating outward
• Sand bank centrepiece: place on a raised sand mound for elevated drama
• Driftwood pairing: flank with driftwood branches to extend the silhouette
• Partial burial: bury one side under substrate for an asymmetric natural look
• Full burial: cover entirely with substrate for an invisible underground tunnel

Frequently asked questions

Will it dominate my tank visually?

That's the point. In a 150L+ tank, you want a clear centrepiece. The arch shape is dramatic but not noisy — it reads as a natural rock formation rather than a moulded ornament. If you want something subtler, our Arch Bridge Corner Cave is the refined version.

Will my pleco fit through the entrance?

On the Large XL, yes — the 81mm opening fits adult bristlenose plecos and most common plecos. For very large sailfin or common plecos approaching 30cm body length, measure first.

Can I bury it in substrate?

Yes — fully or partially. The shape works in three modes: fully visible centrepiece, half-buried for asymmetric naturalism, or fully buried as an underground tunnel where only the entrance shows.

Will it work in a smaller tank?

The Standard size (190mm wide) works in 60-litre tanks and up. The Large XL needs 150L+ to look proportionate — in smaller tanks it dominates more than it should.

Is it suitable for shrimp colonies?

Yes. The XL size is particularly good for large colonies because multiple shrimp can graze the interior surfaces without competing.

Will it work for cichlids?

Yes — the enclosed shape suits cave-spawners like apistogramma, kribensis and electric blue acara. The XL size makes a proper breeding territory.

Why buy from Blubber Cove

Original aquascaper-designed pieces, precision-manufactured to order in our Northumberland workshop in PETG. The XL Centrepiece is the flagship of our cave range. Free UK delivery over £30.