When it comes to the Treasure Chest Feature of Golden Fish Tank 2 Gigablox—the bigger the better. Essentially, it awards a prize whenever the Treasure Chest Symbol appears on the fifth reel. A cash win worth between 2x and 500X your bet amount is obtainable in the base game, along with five, nine, or sixteen free spins. However, if you're already in the free spins, you'll be looking at a cash prize ranging from 2x all the way up to a smashing 500X your total bet amount, plus one, two, three, or five extra free spins.