These are the highest quality industrial-grade Brass Check Valve from German Air Pressure Systems. They are heavy-duty enough for food-grade liquid as well. Just like you, we also thought that these were unnecessarily overkill for...
A natural efficient system for the production and diffusion of CO2 for aquariums up to 40 gallons. This simple and reliable system generates CO2 by a pH buffered natural fermentation process, providing an almost constant supply of...