This is everything you need to get started. 1. 5 Gallon aquarium 2. Brand new Heater (never taken out of the box) 3. Internal filter (with brand new media, and a slightly used sponge 4. Never used green Gravel 5. Fluval Q1 air pump, with air stones I can include Saf-t-Sorb or Crushed Coral for an additional cost, if you need it I also have ammonia if you need it