I am researching what critters to put in a 7g nano and I am starting to
wonder if there is any fish that is really appropriate to put in it. 7g is
not that large and I don't want to put undue stress on any fish that I
introduce. I am only going to put one fish in the tank, so a loner fish or
smaller symbiotic paired fish is my only choice I believe. I am thinking
either a Watchman Goby or goby/pistol pair or Scooter Blenny might be my
only choices. Any other suggestions are welcome. Thanks.

of course there are younger fish you can keep temporarly, but perminently any of the clown
gobies will do wonderfully, some of the more odd cardinals unfortunately that means more
$$, yellow tail damsels will do fine though dont even think of a second fish with one,
smaller tanks make them even more evil, scooter blenny is really only iffy, scooters eat
the same as mandarin gobies, but will venture out into other foods much easier, while M
gobies generally wont and often when they do its not as effective for them. you can keep
a heard of seaponnies or something fancy named like that but basically a handfull of dwarf
seahorses even as many as 4 but then agressive corals are out. some of the firefish will
do good, the goby/pistol if i recall really needs a few " of sand in a 7 thats not as easy
to do.

hope that doesnt tweak your plans too much, i kept a 7 for a long time, and loved it. it
was an AGA bow front with a prizim skimmer never had any real problems with it. thinking
it was the easiest tank to care for. i used kents turbo calc for calcium because i could
add 1 big grain piece every day or so and keep calc up with a few corals in the tank. and
toped off the tank, fead the fish/corals and that was it.

--
richard reynolds