The Milwaukee MA957 supplies adjustable CO₂ flow for aquarium setups, including planted tanks and compatible calcium reactor systems. Its brass regulator combines two pressure gauges with a needle valve, electric solenoid and bubble counter.

• Dual gauges display cylinder pressure and regulated output pressure.
• Needle valve lets you fine-tune CO₂ flow.
• Electric solenoid provides on/off control with a suitable external timer or controller, sold separately.
• Bubble counter provides a visual reference for gas delivery.

Includes: regulator with two gauges, flow regulator, needle valve, electronic solenoid and bubble counter.

Sold separately: CO₂ cylinder, tubing, diffuser or reactor, and external timer or controller. Confirm cylinder connection and system compatibility before ordering.

Shipping: Standard Parcel shipping is $19.99. This item does not qualify for free shipping.