Loved Stargate and Firefly. SG-1 was my favorite. I liked Universe and even got my wife into it. Went a bit more Battlestar Galactica than the other SG series but was still interesting. Hopefully Syfy will bring it back someday and conclude the story. I hate series finale's with open endings.
I believe all of Daniel Jackson's original goldfish ascended and he replaced them with new ones.
I'll tell you who the worst fish abuser is - Elmo. The rotten little monster keeps a new comet goldfish in an unfiltered gallon bowl each week. I cringe when he asks Dorothy the fish a question and they quick pan to Dorothy who is gasping for oxygen or in some episodes resting on the bottom looking ill.
Firefly is too short (too few episodes) but aside from that you won't find a better show about space cowboys. Did you like Buffy?