MEDIUM – 1.5CM THICK AQUARIUM GLASS

New U-Shaped Stainless Steel U-Bend Tubing Connector

• Made of high-quality Stainless Steel.
• U Shape for Co2 System.
• Provide nice alignment for tubing goes over the glass edge from outside to the inside of the tank.
• For 4/6mm tubing.

Compatibility

This is the Medium, and the size means glass thickness, not tank size. CO2Art make three:

Small (A-UB-S) — for 1 cm thick aquarium glass
Medium (A-UB-M) — for 1.5 cm thick aquarium glass — this one
Large (A-UB-L) — for 2 cm thick aquarium glass

Measure before you order. The U has to straddle the top edge of your tank, so what matters is the thickness of the glass itself at the rim. If your tank has a plastic trim or a brace bar, measure the glass, not the trim. Getting this wrong gives you a connector that either will not go on or will not grip.

Tubing: 4/6 mm. That is CO2Art’s standard CO2 line size and what their tubing, check valves and diffusers all use. It will not take airline or 12/16 mm filter hose.

What it is for. It takes the CO2 line over the rim from outside the tank to inside without kinking it. A kinked CO2 line does not simply restrict flow — it makes your bubble count unreliable, which makes everything downstream of it guesswork. It also stops the tubing lifting the lid or fouling the glass cover.

Stainless steel, so it lives permanently half in the water without corroding, and it matches CO2Art’s stainless diffusers if you care how the tank looks.

Four suction cups are included to hold the line down the inside of the glass on its way to the diffuser.

What it goes with: any in-tank diffuser on 4/6 mm line — CO2Art’s IO Diffuser in stainless or acrylic, or their Bazooka Flux. It is not needed with an inline atomizer, which sits in the filter hose outside the tank.

It is a tidiness part, not a functional one. Your CO2 system works without it. It is on this page because a CO2 line draped over a rim looks like a temporary installation for as long as it is there.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.