BettaFishMommy
finkids make me happy :-)
one other thing to consider is the landlord reference you may need from this management company down the road. if you attempt to hide the tanks and they find them and issue an eviction over it, then when you go to rent somewhere else it will reflect badly on your rental history. being as your building is now managed by X company, any future landlords of yours will contact X company because the previous management is no longer affiliated with the building. and X company will most likely only be able to give a reference based on the paperwork attached to your tenancy, not on your character or anything the previous managers (who sounded better IMO!) may know about you.