(going to reply to both reply messages here)

Can you replace this with a 10g tank?

Yeah, probably. Just not sure it's worth it for a $0.20 goldfish
though, unless I step up to other types of schooling fish like tetras
or guppies or something else simple? I'm admittedly new to this, so I'm
not going to rush out and buy freshwater angelfish or anything ;o)

What is the ammonia reading in this tank? How about the nitrite levels?
You do dechlorinate the water you add I hope.

Well, only being into this hobby for 2.5 weeks, I haven't purchased any
testing kits, so I have no idea what the levels are. As mentioned in my
previous post, I've been treating all water with AmQuel+ which helps
manage chloramine, cloride, nitrate, nitrite and ammonia levels,
although I haven't followed up as much on how those levels are affected
by the addative other than the chloramine and chloride levels being
lowered if not elimited. I suppose I could pick up a testing kit at
lunch and have a look.

If he's holding his fins up most of the time and can swim vigorously I
wouldn't be too worried.

Yeah, he's holding his fin up right now, and swims around, he's going
through all levels of the water (top, mid, low) and then settles back
down on the bottom. My wife, who has kept an aquairum for a while
thinks that maybe he's stressed or tired?

Feeders are shipped under appalling conditions, and sometimes a batch will be
so bad off that many die

When I started two weeks ago, I bought two feeder goldfish, and one
died within 24 hours after looking *very* lethargic, and was removed
within 10 seconds of dying - I was keeping a very close eye on it. The
remaining fish has lasted, like I said, two weeks, and has a healthy
appetite and swims just fine, it just seems very odd to me that it'd
rest on the gravel in the tank... didn't seem like normal fish behavior
to me.

Thanks for the followup!

ian