Tank 1 is the easiest tank in all of Insaniquarium.
After beating Tank 1 you will have the following pets:
Tank 1-1: Stinky the Snail is a coin collector pet that can just stay in the bottom of the aquarium.
Tank 1-2: Niko the Oyster opens the mouth once in a while giving you a pearl to you collect
Tank 1-3: Itchy the Swordfish helps you to attack the aliens, but does a really small amount of damage.
Tank 1-4: Prego the Momma Fish giving you a new guppy once in a while.
Tank 1-5: Zorf the Seahorse helps you to keep your fish fed giving level two food to your fish when they become green.
Sylvester: An alien that look like this aliens from SCI FI movies. The weakest alien from all of them, can just eat one fish in a while.
Balrog: A cross between a lion and a mermaid with orange dreadlocks. Behave similar to Sylvester, but is harder to kill.
Tank 1 is also your starting backdrop in Virtual Tank mode.
Tank 1 Fish
Guppy: The basic fish, no coins while a baby, silver coins while medium fish, gold coins while an adult and diamonds as a King Guppy. Costs 100$.
Carnivore: A fish that eats baby guppies and gives you diamonds. Costs 1000$.
Laser Upgrade Cost: 1000$ each.