Hydrofarm AAPA15L Active Aqua, 4 Outlets, 6W, 15 L/min Air Pump, Silver,Grey

This Activ Aqua air pump has a total of 25L/min output shared between eight outlets, which are connected through one manifold. The unit does not include airline tubing or stones. However, it can be used outdoors without a covering. The customers have claimed that using both outlets together produces noise but does not cause any negative effects. It has an aluminum housing, and there are two separate pumps inside its housing which run one line each. So, one pump should not affect the other. But, the customers suggested soaking the end of tubing in boiling water for a few seconds before pushing it on to the barbed pump fitting. This pump is not recommended for depths deeper than four feet, and it cannot be used with input voltage 220v. The Activ Aqua air pump is durable and quiet. However, some reviewers claim that it can be noisy and degrades over time. Although shipping has been a concern, the refund process was fast, according to review comments. **