I have the same problem my wife will notice a problem with my fish that I am more than aware of and trying to fix and it will just frustrate me more to hear her talk about it. She likes fish just not as much as me she said she always wanted a salt water tank and I said she could have what ever she wanted but if its her tank than she dose the work. She also likes to sugest what I should put in my tanks and I say they are my tanks and the ultimate decision is with me when she has a tank and dose the work than she will stock it. She is now thinking of African Cichlids instead of salt water because it will be less work.

