Ramey70
This is one that I am not sure anyone on this site is qualified to answer or to give advice to. I personally am not the aquar-aholic that my boyfriend is, but I would never ask him to give up his tank or worse make him feel inferior for his likes.
But I have to say that it has been said "you can't be made to feel inferior without your own consent"
Do not let her think that you are going to compromise, if you start giving in now the pattern will surely be the same for the remaninder of your lives together. Is she willing to compromise for you?
I can relate to having my way when it comes to the decor of my house, but for me the tank is just a magnificient addition to an already beautiful home, when you walk into our house the tank is in the center of the room, grabbing everyone's attention and setting an atmosphere that I and all my friends seem to love...like my best friend said, we do not even need a TV, the tank is entertainment in itself.
Your fiance obviously has deeper problems with the tank than how it looks, but rather how it makes you look. I mean I have heard of wives asking their husbands to give up drinking, partying, or other hobbies that could bring destruction to a relationship, but not one that keeps you home and has no harmful side affects that I can find. Aside from her complex(not yours) that it makes you seem dorky, I feel that she has zero argument.
I would bet that the only reason her or any of her clients have any negative comments to say about you having a fish tank would be simply because they are jealous...
I really hope everything works out, again do not compromise for someone who obviously is not willing to compromise for you, if image is so important to her then tell her to go ahead buy you the Harley, but you and your fish tank are not going anywhere...if anyone needs to go it should be her and her immature insecurities.(Remember it is her that has the problem not you)