Just about everything you'd need to set up your 50-90 gallon fish tank, saltwater or freshwater. Everything was rinsed well after last use a few years ago, and electric items have been plugged in to ensure they work. The lot includes: - Johnson A419 temperature controller (this alone costs >$100 new) - Rio+ Aqua Pump / Powerhead 1100 - Aqueon QuietFlow 55/75 power filter (up to 90 gal FW or SW) + filter cartridge - Instant ocean for 10 gallons saltwater - Petco air pump - Microbe-Lift Special Blend and Freshwater test kit are included but expired, so I'm not sure how well they will work Cross-listed. Please email if you have questions.