Active Aqua 2W Air Pump (50 GPH) - 1 Outlet

At 50 GPH output, this pump is best suited for small reservoirs — typically up to 10–15 gallons — or single-bucket DWC and propagation setups where a single air stone needs consistent, low-volume aeration. For larger reservoirs or multi-site systems requiring higher output, the Active Aqua lineup includes pumps ranging from 125 GPH up to 700 GPH to match your system's specific aeration demands.

40 dB is roughly equivalent to the ambient noise level of a quiet library or a softly humming refrigerator — barely perceptible in a normally operating grow space. The multi-level muffler system achieves this by dampening the mechanical vibration of the diaphragm at the source, rather than simply housing it in a thicker casing. For stealth setups or noise-sensitive environments, it's one of the quieter options available at this output range.

Yes. The special artificial rubber diaphragm design allows output pressure to be adjusted freely within the operating range, giving you control over airflow intensity without needing an external valve. This is useful for dialing in the right bubble rate for a specific air stone size or reservoir depth.

This pump uses standard ¼" (0.25") airline tubing — the most common size used in hydroponic aeration setups. Active Aqua's compatible tubing is item HGTB25, available separately. Standard ¼" air stones, check valves, and tee fittings are all compatible without adapters.

Yes — an inline check valve is strongly recommended whenever the pump is positioned at or below the waterline of the reservoir. If power is cut unexpectedly, a check valve prevents nutrient solution from back-siphoning through the airline and into the pump body, which can cause permanent damage to the diaphragm. Check valves for ¼" tubing are inexpensive and available alongside air stones and other aeration accessories.

The 2W / 50 GPH model is the entry-level option in the Active Aqua air pump lineup — optimized for quiet single-site operation rather than high-volume multi-reservoir distribution. The lineup scales up through models rated at 125 GPH, 400 GPH, and beyond, with larger units offering multiple outlets for systems running several buckets or large reservoirs. If you're running more than one or two sites, stepping up to a higher-output multi-outlet model is worth considering.