Red SeaFish Pharm ARE21515 Saltwater Reef Color Pro Multi Test Kit for Aquarium

For Christ's sake can you guys explain what this tests instead of acting like anyone wants to hop over to check a periodic table every few letters?!

Can I get the expiration date for the you I buy before I buy?

Hello, I would appreciate it if you could tell me how this test kit is valid.

When does it expire?