New Goldfish Owner

In article .com,
says...
1. The tips of the fins are white. Its always been that way but it
covers about 2mm of the fin. Is this something to worry about? If so
how can I fix it?

Fins looking frayed and damaged? or just white color?
Probably add a tsp of Melafix.


Everything else is common beginner's tale. You need a
good "aquariums for dummies" type reference.
You might find http://lists.aquaria.net/fish/goldfish/puregold/
quite useful.

2. The smaller fish has some kind of poop problem. ...

You're likely overfeeding, no matter what you think.
Fish are _supposed_ to be hungry. All the time.
Pooping some is OK. Pooping a lot means you're over feeding.


3. My water is always slightly foggy. I do at least 10% water changes
daily and even change more than that once a week or so. Is my
filtration not good enough? What would be the best addition? An under
gravel filter or a second hanging filter?

"New Tank Syndrome" Go read http://faq.thekrib.com/begin-cycling.html

For a 10 gallon tank, your filter is sufficient. It just takes
time for the biofiltration to establish. Until then, hazy water
is likely, and you have to do sufficient water changes to keep
the water non-toxic. Don't use straight tap water to rinse your
filter media: use dirty tank water or treated/dechlor water.

Get some test kits: ammonia, nitrite, and
nitrate, also pH, and a thermometer. You want zero or barely
registering ammonia and nitrites, nitrates 40ppm or so.
I honestly suggest 50% water changes every day or two, until
you've cycled. When you change the water, treat it with
Amquel to dechlorinate and negate some ammonia. "Amquel+"
(the plus sign is important) is perhaps even better for the
first month, but it has a somewhat unpleasant odor.
There are other brands that'll work: Prime, Ammolock...
Also make sure the water you add is the same temperature as what
you take out, +/- 2 degrees F.


Good luck.