Hoses and pipes are critical components of an aquarium. Hoses and pipes are required for almost every function - water diversion (inlet and outlet), filtration systems, gas delivery, etc.
Due to constant contact with water, it is important to use only high-quality hose and piping accessories which do not react with the aquarium water. This is especially critical for reef and marine tanks because salt water can be very corrosive to hose, pipes and connectors.
Invest in high-quality hoses and pipes for assurance.