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El Salvador
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Review on 🐠 DGZZI T-Shaped Control Valve - 10 Pack Black Plastic 2-Way Air Line Regulator Connector for Fish Tank Pump (4mm) - Ideal for Aquariums by Heather Collins

Revainrating 5 out of 5

Works great with Air Pump Accessory

With this I can control the air flow very well. I've noticed that it shuts off in one direction, but if you go the other direction with enough RPM it shuts off the air as well because I think it's letting air through the stick. In fact, several were sent together. I've only used two of these, but it's definitely helped with the tanks I use them in.

Pros
  • Easy to install, just plug the connector straight into the air line.
Cons
  • weak