If you lived around here I would trade you a 29 gal. for the 20 especially if its a long. IF your LFS wouldn't take your fish you can still sell them on Craigslist. I see people selling fancy guppies on there quite a bit. Not as much as in LFS but I guess for about the amount LFS will buy them off of you for. My daughter just started breeding fancy guppies and lost interest in them and now I'm taking care of them. I'll give a heads up on how they sell, the first batch will probably be grown enough to sell in about another month at the most. I don't think most of the LFS like taking in fry.