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: A green snail that is a coin collector pet that can just stay in the bottom of the aquarium.
Tank 1-2 :Niko the Oyster: An oyster that opens the mouth once in a while giving you a pearl to you collect
Tank 1-3 :Itchy the Swordfish: A light green swordfish that helps you to attack the aliens, but does a really small amount of damage.
Tank 1-4 :Prego the Momma Fish: A orange fish looking pregnant that works similarly to Breeder from the Tank 4, giving you a new guppy once in a while.
Tank 1-5 :Zorf the Seahorse: A green seahorse that 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.
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