Aquarium

Unlocking Aquarium Slots
When you first unlock the aquarium, the game gives you a free slot. However, to continue to unlock slots, you would need to complete trade sets.

Tanks
In each empty aquarium slot, you are able to buy a tank set. Depending on the size of the tanks in the tank set, they come in different numbers. Fish can be placed in tank sets based on size. If a fish is too large for a tank set, it cannot be placed in the tank. Each tank set pays approximately the base aquarium price of the fish in it, times the amount of hours for collection. You can remove tank sets that you have bought, in order to make space for new ones. However, you do not get any refunds, so choose wisely!

Fish Data
Each fish you catch in the game has an aquarium price, which is slightly different than the sell price. This aquarium price is important in calculating the payout for each aquarium. When the Ad multiplier is active, the sell price is multiplied by 2. However, the aquarium price is only multiplied by 1.6.

The factors that contribute to the payout are the physical size of the fish, it's rarity and rank. To maximize output, tanks should contain fish that are as large and as rare as possible (ie. a small fish should be put in a small tank, which usually comes in bigger quantities in each tank set).

The following table lists some fish's aquarium price and size (explained below). This table is far from complete. Please, feel free to update items that have a max rank lower than SS, and to add items that are not listed yet.

There are 5 sizes of fish, from Small (which you can put in any tank) to Huge (which only fits in the Goliath Tank).