The airflow of each valve can be adjusted individually on the gang valve. These generally come in two, three, four, and five-way valves. By using a gang valve, you don't need to have a separate air pump for each filter, air stone, action ornament, etc. Airline Tubing Airline tubing is the clear plastic flexible tubing that runs air from the air pump to the aquarium. It's always a good idea to buy extra airline tubing because you'll need it to hook up any airstones, underground filters or action ornaments.
Tubing comes in both extruded plastic and silicon tubing.
Silicone tubing is slightly more expensive because it lasts longer and is more flexible. Extruded plastic tubing is stiffer and tends to yellow and crack with age. Information and advice contained on this site is for your consideration only. Please consult your veterinarian for specific advice concerning the care and treatment of your pet. Aqua Scene Desktop Aquariums by Top Fin Ideal for those with limited space or who want to start an aquarium on a budget.