ANS PRO II O-ring replacement (3pcs/pack)

Description

The ANS PRO II O-ring replacement (3pcs/pack) is a CO2 system component for planted aquariums.

Key Features

• Essential for providing carbon dioxide to aquatic plants
• Promotes healthy and vigorous plant growth
• Compatible with standard CO2 regulator setups

ANS PRO II O-Ring Replacement Pack for Singapore CO2 Setups

This three-pack of replacement O-rings keeps your CO2 system sealed where it matters most: the cylinder-to-regulator joint and other fittings on the ANS PRO II line. O-rings are wear parts; the rubber compresses and slowly hardens over months of use, and a flattened ring is the most common reason a regulator hisses or a bottle quietly empties. Having spares on hand means a refill day never gets derailed by a perished seal.

We strongly recommend fitting a fresh O-ring every time you swap or refill a cylinder. In Singapore’s heat and humidity, rubber ages faster, and a slow leak at the bond is easy to miss until your bubble counter has gone still and the bottle reads empty. After fitting, brush a little soapy water on the joint and watch for bubbles; a sealed connection shows none. Never over-tighten, as that splits the ring.

Find compatible parts in our CO2 systems category. For leak-checking, see our CO2 leak detection guide and regulator guide.