we have a local group here, so when i get a fish, that is either given to me, or bought and just doesnt fit in with his tank mates, i try there first. i dont feel as bad knowing its going to someone that knows about fish..
or i buy new tanks.i have a 150, 90,2x55, 2x 20 (and im hunting for a 50 hex) a 30 turtle tank.my house sounds like niagra falls, ..i have tanks in everyroom but the bathrooms, and just the other day threaten my 10 yr old if he didnt clean his room, he was gonna lose it , and i was gonna turn it into a fish room..
or you find a friend that shows interest in fish, and get them interested in fish and have them buy and set up tanks...i have a friend i go involved into fish and she has a 55, a 20 and 2x10 gallons, and this is only been about 6 months. she gets my smaller dont fit ins..
i feel guilty about getting rid of them also, but i understand, its like i get my tank perfect,fish perfect and the challenge of keeping it isnt hard anymore and i want something harder to keep and a tank to redo..