Blubber Cove Glass-Mounted Aquarium Tunnel – Suction Cup Fish & Shrimp Hideout

A glass-mounted aquarium tunnel that attaches to the tank wall with suction cups, creating a mid-water hideout that your fish and shrimp will actually use. Unlike substrate caves, this one adds vertical dimension — mount it low as a ground-level shelter or high as a floating mid-tank retreat.

The 55mm × 40mm tunnel openings are sized for shrimp, nano fish, bettas, and corys. The suction cup mounting means it can be repositioned without disturbing the substrate, making it easy to experiment with placement until your livestock settle in.

Features

• Mounts directly to tank glass with strong suction cups — no substrate needed
• Creates mid-water cover — adds vertical interest to flat aquascapes
• Tunnel openings sized for shrimp, bettas, corydoras, and nano fish
• Works in freshwater and saltwater setups
• Fish-safe aquarium-grade plastic — no toxins, no leaching
• Repositionable — suction cups hold firmly but release cleanly
• Made from eco-friendly material in our Northumberland, UK workshop
• 11 colour options

Specs

Full tunnel: 130mm (W) × 70mm (D) × 40mm (H)
Tunnel openings: 55mm × 40mm

FAQs

How strong are the suction cups?
Strong enough to hold the tunnel against the glass in normal tank conditions. Wet the suction cups before mounting for the best grip. Check and reseat them monthly as a precaution.

Will bettas use it?
Yes — bettas frequently use glass-mounted tunnels as resting spots, especially when mounted at a height that suits their preference for mid-to-upper water. Many customers report bettas sleeping inside the tunnel.

Can shrimp get through the openings?
Yes. The 55mm opening is well above the size of any adult neocaridina or caridina shrimp — they move through freely.

Is it suitable for saltwater?
Yes — the plastic is inert in both freshwater and saltwater setups.