There is a list of how many points are need for each level up to 46 on Gamezebo's Happy Aquarium strategy guide: http://www.gamezebo.com/facebook-games/happy-aquarium/walkthrough
You can get experience also when you clean your neighbor's aquarium.
if you log in for a certain number of days you get one
no, you cant steal fish in happy aquarium
No, you can't adopt any animals you rescue in Happy Aquarium or other games like Happy Aquarium.
Play happy pets & Happy aquarium on the same Facebook account and it should work.
How do you transfer you fish eggs to the nursery in happy aquarium
well some people say there are no cheats for Happy Aquarium.
Your happy aquarium neighbors post them for adoption
Farmville, Happy Aquarium*, and Mafia Wars! (Happy Aquarium is my favorite!) :]
where you search for peaple, type in happy aquarium then click search or enter then click the one that says happy aquarium and then when that page comes up click go to application.
Cleaning your own tanks,your friends tanks, Training your fish and feeding them(: Doing the Achievements also awards xp :)
you don'tYou can't break the glass in happy aquarium because it is only a virtual game.