Do you think you need to change the water system in your aquarium? There is a wide variety of supplies to help you make the improvements you want. Just go to a store or retailer specializing in aquarium supplies. For a brand that you can depend on to give you durable products, look for Loc-Line 3/4 Inch Ball Socket - Round Nozzle www. petstore. com. It is made of a high grade polymer material which can resist coolants, petroleum products and other chemicals that may contaminate the aquarium water system. Since it is not made of metal, any machine tool that you might use in your aquarium will not be damaged if it accidentally gets in contact with the socket. Unlike other brands that uses copper tubing, you will not have to worry about metal fatigue happening in the tank which can have a bad effect on your aquarium fish and other aquatic pets. The material also makes the product a good insulator which will conduct electricity. The ball and socket design also lets you adjust it easily in whatever length and position you would need. For a product that would help you in the improvement of your aquarium's water system, look for Loc-Line 3/4 Inch Ball Socket - Round Nozzle.