aldiaz33;3768739; said:I'm going to play devil's advocate because everyone on here is only going to give you the pro fish addiction response. It's your girlfriend’s house. You seem to be filling it with tanks that she doesn't necessarily want. I don't know all the details of your situation, but I can see your hobby causing problems for your relationship. Apparently she has agreed to put a roof over your head, but did she also agree to housing your collection of fish tanks?
Sounds like you like finding deals on cheap tanks (who doesn't). I would inspect these tanks very carefully before buying. Sometimes you can find tanks for cheap because they are total junk. If one of your tanks fails, she could pull the plug on your entire operation.
If you were covering half the mortgage payment, then maybe you'd have a leg to stand on, but otherwise you need to respect that it's her house.
Disclaimer: I don't mean to be a joy kill...just giving you a difference perspective.
Ditto this also. There is a difference in a hobby and an addiction as well. A hobby is a tank or two, and it's not an unreasonable request to ask someone to let you set up a single smallish tank in their home.
good luck