local tankSide = "back"  --Change it to the side where your tank is connected to
t = peripheral.wrap(tankSide)
data = t.getTankInfo(tankSide)

for i, liquid in pairs(data) do
    print(liquid["rawName"])  --The name of the liquid, as it is called in game
    print(liquid["amount"])  --The current amount of the liquid in the tank
    print(liquid["capacity"])  --The total capacity of the liquid in the tank
    print(liquid["name"])  --The name of the liquid, as it is called in the source code
    print(liquid["id"])  --The ID of the liquid
end