Tanks

In Insaniquarium, there are 4 Tanks, Labeled Numarically. Each Tank comes with Different Aliens, Fish, and Egg Piece Prices. The Game gets Harder as you Progress through each Tank.

Tank 1
Tank 1 is the Normal Fish Tank Scenery that can be Seen at the Start of the Game in your Virtual Tank. Aliens in this Tank Include Sylvester and Balrog. This is the First and Easiest Tank, which Unlocks the First 5 Pets: Stinky, Niko, Itchy, Prego, and Zorf. You Start in this Tank with Regular Guppies and Carnivores.

Tank 2
Tank 2 has a Pinkish-Orange Scenery and isn't Much more Difficult than Tank 1. It is the Second Tank with Gus and The Destructor as the Only 2 Alien Types, and in it you Unlock the Second 5 Pets: Clyde, Vert, Rhufus, Meryl, and Wadsworth. The Starcatcher and Starguppies also Show up in this Tank.

Tank 3
Tank 3 is where Things get a Little more Difficult. It is the Third Tank and has 4 Aliens Possible to Attack: Gus, The Destructor, Ulysses, and Psychosquid... However it is Likely that Gus is the only one Not to Attack. Fancy Fish here include the Starcatcher, Beetlemuncher, and Guppycruncher. You Unlock the Third 5 Pets here, Including Seymour, Shrapnel, Gumbo, Blip, and Rhubarb.

Tank 4
Tank 4 is the Final Tank, making it the Most Challenging to get through. It has Every Possible Alien ready to Attack, with the New Alien, Bilaterus, though Sylvester and Balrog are not the most Difficult Alien Types and Probably will not Attack here. It has Every Possible Fish, now Including the Kilvore, and Unlocks the Last 5 Pets: Nimbus, Amp, Gash, Angie, and Presto.

After you Finish Collecting all 20 Pets, you will have to Defeat the Boss Alien: Cyrax. Afterwards, Adventure Mode turns into Bonus Adventure Mode where, After buying the Egg, you get to Grab Shells and Work Towards buying the 4 Bonus Pets.