The ISTA 2 in 1-Metal Bubble Counter & Check Valve is a durable is a solid metal aquarium accessory combining a CO2 bubble counter and a stainless steel spring check valve.
The ISTA 2 in 1-Metal Bubble Counter & Check Valve is a durable is a solid metal aquarium accessory combining a CO2 bubble counter and a stainless steel spring check valve.
Key Features:
- Dual Function: Acts as both a visual bubble rate monitor and a backflow preventer.
- Stainless Steel Spring: Reliable check valve mechanism stops water from siphoning into the regulator.
- Heavy-Duty Build: Solid metal construction ensures a long lifespan and professional aesthetic.
- Universal Thread: Fits approximately 95% of standard CO2 regulators and needle valves.
Setup and Use:
- Placement: Mounts directly onto the regulator output or needle valve, or connects in-line with standard aquarium CO2/air tubing.
- Filling: Unscrew the transparent chamber, fill with a small amount of water (or syringe fill) to track bubbles, and secure tightly.
- Direction: Ensure the flow direction aligns with the internal check valve orientation.


















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